Gordon, Powroll kit?
#1
12-27-1999, 12:41 PM
Join Date: Aug 1999
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
#2
12-28-1999, 12:57 AM
Join Date: Aug 1999
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
#3
12-28-1999, 06:18 PM
#4
12-29-1999, 12:28 PM
Join Date: Aug 1999
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
#5
12-29-1999, 06:01 PM
I don't think they got a web sute but they do have a an email address. Dang it, Ican't find the address. You should check the back of some old mags where it has all the companies. Its probably there.
------------------
Evan Johnson 99 400EX 88 LT250R I apologize ahead of time for my bad spelling/typing
------------------
Evan Johnson 99 400EX 88 LT250R I apologize ahead of time for my bad spelling/typing
#7
01-01-2000, 12:35 PM
I think I've answered most of Matt's questions through private e-mail, but for others who may be interested...
You should call for current prices (541)923-1290, but I believe the 313cc Big Bore kit cost $295. It includes a head gasket, piston, rings, and sleeve. You are supposed to supply a new base gasket.
I did the engine work myself, so I can't say what a local mechanic might charge. It takes me about an hour to pull a clean engine down to the point of piston removal, and about 1.5 hours to reassemble, to include adjusting the valves. My local machine shop charged about $115 to do the cylinder, which includes pressing out the stock sleeve, boring the cylinder to accept the new sleeve, resurfacing the top of the new sleeve flush with the cylinder, and then boring the new sleeve for the new piston.
Upon reassembly, I used a thin thread of hi-temp silicone sealant (but you can ruin the engine if you use too much or too little!) instead of the Honda base gasket, in order to raise the compression a little more.
It's not an inexpensive or an easy mod, but it made a very big difference. The torque increased to the point where 1st gear is almost useless except in truly heavy-duty circumstances. I now ride almost everything a gear higher than before. It accelerates side by side with a stock Honda 450, up to about 30-35 mph. The Big Bore kit made only a slight difference in top speed, however, since I am using the stock carb, pipe, and muffler (it looks and sounds totally stock).
I also bought and tried the Powroll pipe, and it made a HUGE improvement in mid-range! I'm talking about foot-tall wheelies when shifted into 2nd gear at full throttle! But the pipe was so loud, I tried adding another $45 worth of exhaust diffusers and silencer caps, and it was STILL too loud, so I quit using it. Also, since it had a larger header pipe, it reduced bottom end torque ("off-idle" torque) so much it had less pull than when stock! The IDS muffler/pipe we put on Steve West's 300 is much better, adding a little more mid-range without noticeably reducing bottom end. If anyone wants it, I'll sell the Powroll pipe, already fitted and welded, with the extra silencing aids, all for $100, or $110 to include UPS. But I warn you, it's still pretty loud!
FYI, my "bottom end test" is simply this. I tie one end of a rope or chain to the towing hitch, and fasten the other end to a tree or something immovable. It is VERY important to have the rope or chain LEVEL! Then on dry grass, I pull the rope tight, and then, in 1st gear, punch the throttle. A good running but totally stock 300 usually spins all four tires, and that's just what we want it to do. With the Powroll pipe, despite the powerful mid-range hit, the bike would not spin all four tires from an idle. Note, however, that if the rope angles upward from the bike to the tree, it will make it much easier to spon the tires. It the rope angles downward from the bike to the tree, it will make it harder to spin the tires. So be sure the rope is almost perfectly level to get a good "read".
If you want to rig a pulling contest with a friend's larger machine, tie the tow rope high on your bike, and low on his. The pulling force will give you more traction, and give the other machine less traction.
Happy New Year, Y'all!
Gordon Banks
Huntsville, AL
2000 Honda XR400R
1999 Honda 450ES
1997 Honda 300 4x4
1947 Body (w/padding by Pizza Hut)
You should call for current prices (541)923-1290, but I believe the 313cc Big Bore kit cost $295. It includes a head gasket, piston, rings, and sleeve. You are supposed to supply a new base gasket.
I did the engine work myself, so I can't say what a local mechanic might charge. It takes me about an hour to pull a clean engine down to the point of piston removal, and about 1.5 hours to reassemble, to include adjusting the valves. My local machine shop charged about $115 to do the cylinder, which includes pressing out the stock sleeve, boring the cylinder to accept the new sleeve, resurfacing the top of the new sleeve flush with the cylinder, and then boring the new sleeve for the new piston.
Upon reassembly, I used a thin thread of hi-temp silicone sealant (but you can ruin the engine if you use too much or too little!) instead of the Honda base gasket, in order to raise the compression a little more.
It's not an inexpensive or an easy mod, but it made a very big difference. The torque increased to the point where 1st gear is almost useless except in truly heavy-duty circumstances. I now ride almost everything a gear higher than before. It accelerates side by side with a stock Honda 450, up to about 30-35 mph. The Big Bore kit made only a slight difference in top speed, however, since I am using the stock carb, pipe, and muffler (it looks and sounds totally stock).
I also bought and tried the Powroll pipe, and it made a HUGE improvement in mid-range! I'm talking about foot-tall wheelies when shifted into 2nd gear at full throttle! But the pipe was so loud, I tried adding another $45 worth of exhaust diffusers and silencer caps, and it was STILL too loud, so I quit using it. Also, since it had a larger header pipe, it reduced bottom end torque ("off-idle" torque) so much it had less pull than when stock! The IDS muffler/pipe we put on Steve West's 300 is much better, adding a little more mid-range without noticeably reducing bottom end. If anyone wants it, I'll sell the Powroll pipe, already fitted and welded, with the extra silencing aids, all for $100, or $110 to include UPS. But I warn you, it's still pretty loud!
FYI, my "bottom end test" is simply this. I tie one end of a rope or chain to the towing hitch, and fasten the other end to a tree or something immovable. It is VERY important to have the rope or chain LEVEL! Then on dry grass, I pull the rope tight, and then, in 1st gear, punch the throttle. A good running but totally stock 300 usually spins all four tires, and that's just what we want it to do. With the Powroll pipe, despite the powerful mid-range hit, the bike would not spin all four tires from an idle. Note, however, that if the rope angles upward from the bike to the tree, it will make it much easier to spon the tires. It the rope angles downward from the bike to the tree, it will make it harder to spin the tires. So be sure the rope is almost perfectly level to get a good "read".
If you want to rig a pulling contest with a friend's larger machine, tie the tow rope high on your bike, and low on his. The pulling force will give you more traction, and give the other machine less traction.
Happy New Year, Y'all!
Gordon Banks
Huntsville, AL
2000 Honda XR400R
1999 Honda 450ES
1997 Honda 300 4x4
1947 Body (w/padding by Pizza Hut)
Trending Topics
#8
01-02-2000, 02:04 PM
Join Date: Aug 1999
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
I'm getting the high performance kit, but I'm buying all the parts separately, do I need the jet kit? Gordon, you said it was almost useless except for the needle, is it a nessecity to make the quad run right with extra air flow?
------------------
Matt Sibley
1999 Honda 300 4x4 Vampires, Lift Kit, 2500lb WARN winch
------------------
Matt Sibley
1999 Honda 300 4x4 Vampires, Lift Kit, 2500lb WARN winch
#9
01-02-2000, 09:39 PM
Join Date: Aug 1999
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
#10
01-03-2000, 01:01 PM
Join Date: Aug 1999
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts