New Piston/Cam review
#1
05-08-2006 | 04:01 AM
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Pro Rider
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New Piston/Cam review
A little review for anyone looking to add a piston and cams to thier DS.
First of all I want to say that I have no interest in going Big Bore, building a full on drag bike or spending heaps of money........but I do like to go fast up the hill and climb the super steep dunes and wanted a little bit more all the time power that nitrous could not provide.
My goal for the bike was to get the stock bore to rev fast, hold 3rd gear in a good RPM range 6500-7500 so I can eat up some 450's on the face of Sand Mountain. Also to build it to where I can through a little nitrous at it when I need just a little more to get my wide butt comfortably up the fingers of Sand Mtn. or racing the steep side.
So for those of you on here contemplating some "mid" priced performance upgrades this may be helpfull. With that in mind having already added the TM45, I decided after much research and question asking, to go with the 12:1 HPR nitrous ready piston and and the HR3 cams with shim under bucket kit.
I have not ever had it on a dyno but I can say based on the heads up races against bikes that I normaly run against and from watching my tach I can hold about 1500-2000 RPM higher on the valley side of Sand Mtn. so I am able to keep it in the "power band" where I could not before and that translates to about 10 bike lengths depending on sand conditions. The one thing that I was worried about(and until I got the right Jetting, fuel, and plugs figured out I thought I had lost) was the bottom end HP and torque. Now that its dialed in I am just amazed at the gains in top end while retaining the bottom end. I've heard you just cant get that with 109's but I will admit I have no experience with those.
I used to run right with or just a little off of mildly modded 450's, this weekend I could let em go off the line and catch and pass em' and man thats alot of fun. Jed(650VIPER) ran the hill a few times with it and I will let him post is impressions if he wants, but I am another very satisfied HPR customer and feel it was well worth the cost.
On the down side I can no longer keep the front end down, which is alot of fun for the most part, but on the really steep stuff I cant power shift down with out it trying to wheelie over and often I have to back out of it and lose momentum for the same reason. I really didn't want to have to get a longer swing arm but it looks like that where I'm headed.
I also wanted to say that the customer service I got from Glenn and Ron at On-dunes was beyond compare, I was in a tight spot trying to get the parts in and on my bike before my installer (father-in-law) went out of town for 6 months. Those that have dealt with the HPR guys already know that they are always there if you need anything. Thanks again guys
On another note, extending an already long post, I bought an ODP billet water pump awhile ago and have not gotten around to installing it until now. To answer some of the questions that have been brought up about it I installed a light in my dash so I could see when fan is running. On my first trip 2 weeks ago it was cool and I did not notice the fan on much but when it did come on it was only for a few seconds. This weekend was alot warmer and we mainly stayed right on the hill racing up and down. This is where I think the pump shines, Flat out full throttle racing on our mountain can really warm up the engine its a long pull, the fan would usually kick on at or near the top, by the time I turned around and headed back down (idleing) it now turns off about 1/4 way down the hill. It used to run all the way down and was still on when I stopped at the bottom.
So for my application its seems to help and worked great.
First of all I want to say that I have no interest in going Big Bore, building a full on drag bike or spending heaps of money........but I do like to go fast up the hill and climb the super steep dunes and wanted a little bit more all the time power that nitrous could not provide.
My goal for the bike was to get the stock bore to rev fast, hold 3rd gear in a good RPM range 6500-7500 so I can eat up some 450's on the face of Sand Mountain. Also to build it to where I can through a little nitrous at it when I need just a little more to get my wide butt comfortably up the fingers of Sand Mtn. or racing the steep side.
So for those of you on here contemplating some "mid" priced performance upgrades this may be helpfull. With that in mind having already added the TM45, I decided after much research and question asking, to go with the 12:1 HPR nitrous ready piston and and the HR3 cams with shim under bucket kit.
I have not ever had it on a dyno but I can say based on the heads up races against bikes that I normaly run against and from watching my tach I can hold about 1500-2000 RPM higher on the valley side of Sand Mtn. so I am able to keep it in the "power band" where I could not before and that translates to about 10 bike lengths depending on sand conditions. The one thing that I was worried about(and until I got the right Jetting, fuel, and plugs figured out I thought I had lost) was the bottom end HP and torque. Now that its dialed in I am just amazed at the gains in top end while retaining the bottom end. I've heard you just cant get that with 109's but I will admit I have no experience with those.
I used to run right with or just a little off of mildly modded 450's, this weekend I could let em go off the line and catch and pass em' and man thats alot of fun. Jed(650VIPER) ran the hill a few times with it and I will let him post is impressions if he wants, but I am another very satisfied HPR customer and feel it was well worth the cost.
On the down side I can no longer keep the front end down, which is alot of fun for the most part, but on the really steep stuff I cant power shift down with out it trying to wheelie over and often I have to back out of it and lose momentum for the same reason. I really didn't want to have to get a longer swing arm but it looks like that where I'm headed.
I also wanted to say that the customer service I got from Glenn and Ron at On-dunes was beyond compare, I was in a tight spot trying to get the parts in and on my bike before my installer (father-in-law) went out of town for 6 months. Those that have dealt with the HPR guys already know that they are always there if you need anything. Thanks again guys
On another note, extending an already long post, I bought an ODP billet water pump awhile ago and have not gotten around to installing it until now. To answer some of the questions that have been brought up about it I installed a light in my dash so I could see when fan is running. On my first trip 2 weeks ago it was cool and I did not notice the fan on much but when it did come on it was only for a few seconds. This weekend was alot warmer and we mainly stayed right on the hill racing up and down. This is where I think the pump shines, Flat out full throttle racing on our mountain can really warm up the engine its a long pull, the fan would usually kick on at or near the top, by the time I turned around and headed back down (idleing) it now turns off about 1/4 way down the hill. It used to run all the way down and was still on when I stopped at the bottom.
So for my application its seems to help and worked great.
#2
05-08-2006 | 12:02 PM
Pro Rider
Joined: May 2004
Posts: 1,936
Likes: 2
New Piston/Cam review
Good post Nate.
Well, he's got his hands full. That thing wheelies like a motha. You have to sit on the tank to take off, and still roll into the throttle, then as you reach the crest of the face, you have slide back up on her to keep her down. Its alot of fun. As for the cams and piston. I run the same piston in mine, just a larger cam. I run 14-1 and 109's in my wifes bike. Now my wifes bike was faster, but had better drag tires, and a drag pipe. It also has a mild port job on the head. Other than that there the same. Well one would think the 14-1 would have more snap out of idle. Not so. I finally was able to see the difference between the 109's and the hpr 3's. The three's definitly have more bottom end.
Nate your bike runs great, you should be happy. But ya, you might want to consider a swinger baby!!
Well, he's got his hands full. That thing wheelies like a motha. You have to sit on the tank to take off, and still roll into the throttle, then as you reach the crest of the face, you have slide back up on her to keep her down. Its alot of fun. As for the cams and piston. I run the same piston in mine, just a larger cam. I run 14-1 and 109's in my wifes bike. Now my wifes bike was faster, but had better drag tires, and a drag pipe. It also has a mild port job on the head. Other than that there the same. Well one would think the 14-1 would have more snap out of idle. Not so. I finally was able to see the difference between the 109's and the hpr 3's. The three's definitly have more bottom end.
Nate your bike runs great, you should be happy. But ya, you might want to consider a swinger baby!!
#4
05-08-2006 | 05:30 PM
Extreme Pro Rider
Joined: Feb 2002
Posts: 3,859
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New Piston/Cam review
Good job Nate, glad you're lovin' it!
I talked to your pa-in-law a little bit this week, really nice guy, I could tell he was one of those guys that takes his time and does things right the first time.
Can't wait til next week man, I'm pulling out in 8 days - see ya at the mountain!
I talked to your pa-in-law a little bit this week, really nice guy, I could tell he was one of those guys that takes his time and does things right the first time.
Can't wait til next week man, I'm pulling out in 8 days - see ya at the mountain!
#5
05-08-2006 | 09:22 PM
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Joined: May 2005
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#6
05-08-2006 | 10:10 PM
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Joined: Jul 2002
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New Piston/Cam review
Try running that stock swing arm for a bit. You may get used to it. As long as your aren't drag racing all the time rolling into the throttle a little isn't that big a deal.
Glad to hear you are happy with your build. A Piston / Cam / Cam spring / Carb / Pipe / Air Filter set-up is extremely impressive power gains for a reasonable price.
One thing you have to give the DS these days is they are priced low enough to where you can afford to put some if not all the things above on for the same price as a piped / air filter / air intake YFZ.
Keep an eye on your valve springs. Good idea to change them once a season. . . every two seasons at the most.
Glad to hear you are happy with your build. A Piston / Cam / Cam spring / Carb / Pipe / Air Filter set-up is extremely impressive power gains for a reasonable price.
One thing you have to give the DS these days is they are priced low enough to where you can afford to put some if not all the things above on for the same price as a piped / air filter / air intake YFZ.
Keep an eye on your valve springs. Good idea to change them once a season. . . every two seasons at the most.
#7
05-08-2006 | 11:47 PM
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Joined: Apr 2004
Posts: 1,739
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New Piston/Cam review
Originally posted by: SLC650
A little review for anyone looking to add a piston and cams to thier DS.
First of all I want to say that I have no interest in going Big Bore, building a full on drag bike or spending heaps of money........but I do like to go fast up the hill and climb the super steep dunes and wanted a little bit more all the time power that nitrous could not provide.
My goal for the bike was to get the stock bore to rev fast, hold 3rd gear in a good RPM range 6500-7500 so I can eat up some 450's on the face of Sand Mountain. Also to build it to where I can through a little nitrous at it when I need just a little more to get my wide butt comfortably up the fingers of Sand Mtn. or racing the steep side.
So for those of you on here contemplating some "mid" priced performance upgrades this may be helpfull. With that in mind having already added the TM45, I decided after much research and question asking, to go with the 12:1 HPR nitrous ready piston and and the HR3 cams with shim under bucket kit.
I have not ever had it on a dyno but I can say based on the heads up races against bikes that I normaly run against and from watching my tach I can hold about 1500-2000 RPM higher on the valley side of Sand Mtn. so I am able to keep it in the "power band" where I could not before and that translates to about 10 bike lengths depending on sand conditions. The one thing that I was worried about(and until I got the right Jetting, fuel, and plugs figured out I thought I had lost) was the bottom end HP and torque. Now that its dialed in I am just amazed at the gains in top end while retaining the bottom end. I've heard you just cant get that with 109's but I will admit I have no experience with those.
I used to run right with or just a little off of mildly modded 450's, this weekend I could let em go off the line and catch and pass em' and man thats alot of fun. Jed(650VIPER) ran the hill a few times with it and I will let him post is impressions if he wants, but I am another very satisfied HPR customer and feel it was well worth the cost.
On the down side I can no longer keep the front end down, which is alot of fun for the most part, but on the really steep stuff I cant power shift down with out it trying to wheelie over and often I have to back out of it and lose momentum for the same reason. I really didn't want to have to get a longer swing arm but it looks like that where I'm headed.
I also wanted to say that the customer service I got from Glenn and Ron at On-dunes was beyond compare, I was in a tight spot trying to get the parts in and on my bike before my installer (father-in-law) went out of town for 6 months. Those that have dealt with the HPR guys already know that they are always there if you need anything. Thanks again guys
On another note, extending an already long post, I bought an ODP billet water pump awhile ago and have not gotten around to installing it until now. To answer some of the questions that have been brought up about it I installed a light in my dash so I could see when fan is running. On my first trip 2 weeks ago it was cool and I did not notice the fan on much but when it did come on it was only for a few seconds. This weekend was alot warmer and we mainly stayed right on the hill racing up and down. This is where I think the pump shines, Flat out full throttle racing on our mountain can really warm up the engine its a long pull, the fan would usually kick on at or near the top, by the time I turned around and headed back down (idleing) it now turns off about 1/4 way down the hill. It used to run all the way down and was still on when I stopped at the bottom.
So for my application its seems to help and worked great.
A little review for anyone looking to add a piston and cams to thier DS.
First of all I want to say that I have no interest in going Big Bore, building a full on drag bike or spending heaps of money........but I do like to go fast up the hill and climb the super steep dunes and wanted a little bit more all the time power that nitrous could not provide.
My goal for the bike was to get the stock bore to rev fast, hold 3rd gear in a good RPM range 6500-7500 so I can eat up some 450's on the face of Sand Mountain. Also to build it to where I can through a little nitrous at it when I need just a little more to get my wide butt comfortably up the fingers of Sand Mtn. or racing the steep side.
So for those of you on here contemplating some "mid" priced performance upgrades this may be helpfull. With that in mind having already added the TM45, I decided after much research and question asking, to go with the 12:1 HPR nitrous ready piston and and the HR3 cams with shim under bucket kit.
I have not ever had it on a dyno but I can say based on the heads up races against bikes that I normaly run against and from watching my tach I can hold about 1500-2000 RPM higher on the valley side of Sand Mtn. so I am able to keep it in the "power band" where I could not before and that translates to about 10 bike lengths depending on sand conditions. The one thing that I was worried about(and until I got the right Jetting, fuel, and plugs figured out I thought I had lost) was the bottom end HP and torque. Now that its dialed in I am just amazed at the gains in top end while retaining the bottom end. I've heard you just cant get that with 109's but I will admit I have no experience with those.
I used to run right with or just a little off of mildly modded 450's, this weekend I could let em go off the line and catch and pass em' and man thats alot of fun. Jed(650VIPER) ran the hill a few times with it and I will let him post is impressions if he wants, but I am another very satisfied HPR customer and feel it was well worth the cost.
On the down side I can no longer keep the front end down, which is alot of fun for the most part, but on the really steep stuff I cant power shift down with out it trying to wheelie over and often I have to back out of it and lose momentum for the same reason. I really didn't want to have to get a longer swing arm but it looks like that where I'm headed.
I also wanted to say that the customer service I got from Glenn and Ron at On-dunes was beyond compare, I was in a tight spot trying to get the parts in and on my bike before my installer (father-in-law) went out of town for 6 months. Those that have dealt with the HPR guys already know that they are always there if you need anything. Thanks again guys
On another note, extending an already long post, I bought an ODP billet water pump awhile ago and have not gotten around to installing it until now. To answer some of the questions that have been brought up about it I installed a light in my dash so I could see when fan is running. On my first trip 2 weeks ago it was cool and I did not notice the fan on much but when it did come on it was only for a few seconds. This weekend was alot warmer and we mainly stayed right on the hill racing up and down. This is where I think the pump shines, Flat out full throttle racing on our mountain can really warm up the engine its a long pull, the fan would usually kick on at or near the top, by the time I turned around and headed back down (idleing) it now turns off about 1/4 way down the hill. It used to run all the way down and was still on when I stopped at the bottom.
So for my application its seems to help and worked great.
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#9
05-09-2006 | 12:13 AM
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#10
05-09-2006 | 12:18 AM
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New Piston/Cam review
Originally posted by: DuneMe
Try running that stock swing arm for a bit. You may get used to it. As long as your aren't drag racing all the time rolling into the throttle a little isn't that big a deal.
Glad to hear you are happy with your build. A Piston / Cam / Cam spring / Carb / Pipe / Air Filter set-up is extremely impressive power gains for a reasonable price.
One thing you have to give the DS these days is they are priced low enough to where you can afford to put some if not all the things above on for the same price as a piped / air filter / air intake YFZ.
Keep an eye on your valve springs. Good idea to change them once a season. . . every two seasons at the most.
Try running that stock swing arm for a bit. You may get used to it. As long as your aren't drag racing all the time rolling into the throttle a little isn't that big a deal.
Glad to hear you are happy with your build. A Piston / Cam / Cam spring / Carb / Pipe / Air Filter set-up is extremely impressive power gains for a reasonable price.
One thing you have to give the DS these days is they are priced low enough to where you can afford to put some if not all the things above on for the same price as a piped / air filter / air intake YFZ.
Keep an eye on your valve springs. Good idea to change them once a season. . . every two seasons at the most.
The BOSS should be shipping next week some time and I'm really hoping to have it on for the big weekend with Hightower on the 20th, but if not then for memorial day at St. Ann's!
Still got to get that Vortex CDI on there as well so I can actually use more of that power.
As far as the camp cook, Marky does a pretty good job [img]i/expressions/face-icon-small-happy.gif[/img]