Baja 90cc
Sep 5, 2006 | 08:14 AM
#321
Trailblazer
Joined: May 2005
Posts: 82
Likes: 0
Baja 90cc
I would get the new 4-speed man. shifter for low end power....same price as my 2-speed auto.....if you stop on a dirt hill on mine......it won't go up.....mine has good high end speed buy no low end power at all....auto's are known for this....the man. shifters on the new Baja 90cc are much better.....I may sell mine for a new one.........I like the camo ones but for some reason they did not put the shifter's on them.
Sep 5, 2006 | 02:48 PM
#322
Weekend Warrior
Joined: Sep 2005
Posts: 3
Likes: 0
Baja 90cc
Sawyer............I just sold my little Baja 50cc dirt bike to neighbors boy who is good friends with my boy..........had it for 3 years ........my wife did not like me selling it.........she really like that bike.........but my carb overflow float kept getting stuck.......I tap it a few times to loosen it up..........just knew in a matter of time I would have to tear that carb apart and clean it..........I sold it for $ 250.....paid $399 for it new..........I think I did ok....my boy now has a new riding buddy.....oh by the way this is Bozzy on my work computer..........and hows your 50cc dirt bike doing ??
Sep 6, 2006 | 01:22 AM
#323
Trailblazer
Joined: Sep 2005
Posts: 40
Likes: 0
Baja 90cc
Hi Abom,
Welcome to the Forum.
BOTTOMING OUT - They do tend to bottom out quite easily if you are riding in rutted areas. The skid plate to protect the back end is not very high off the ground and this is what you get caught up on. I recently did some minor modifications to our two. I bought bigger tires, Duro 19X8X7, and put them on and increased the ground clearance by probably a couple of inches or so. We are running the tires inflated to around 12 psi, a little higher than we probably should be but this has helped the ground clearance issue. They seem to be a better tire than the stock ones also.
HILLS / LOW END TORQUE - We have never had any problems with ours. They have been ridden in some pretty hilly areas and have done just fine. You do have to make sure you approach bigger hills with a bit of momentum. In addition to, and because of, changing the tires, we changed the rear sprocket. The bigger rolling radius of the tires caused us a bit of a problem, as we were told would happen by the shop we bought the tires from. The main issue was that in the 20 km range the engine would start to bog down due to the gearing being off. We changed from the 41 tooth sprocket to a 39 tooth sprocket and it made a world of difference. It does take a bit of top end speed off the ATVs but definitely helps the low end torque. Even if you don't change the tires, changing the rear sprocket would help the low end.
While doing these modifications I found a couple of excellent suppliers. The first one is ROYAL DISTRIBUTING (www.royaldistributing.com). They have a few locations in Canada, one of which is about 45 minutes from where we live, and the folks there are very helpful. I understand that they will ship to just about anywhere. They have a great on-line catalogue. This is where we bought the tires as well as a bunch of other miscellaneous items. My son and daughter, and my wife even, love the place. They go out of their way to help. Finding replacement parts for these units is not very easy and Baja are not much help in most cases. When I went to see them in their Guelph location we spoke with a young ATV racer who gave us lots of input. We explained our ground clearance issue and asked for suggestions and he was the one that told us not to go over 19 inches as it would have too much affect on the units. He also told us that we could change out the rear sprocket to counter the detrimental affects. When we took the sprocket off the one unit and went up to see them they kept it for a day and checked thru all their inventory to try to find us one. No luck though, which brings me to the next supplier.
SPROCKET SPECIALISTS (www.sprocketspecialists.com). The name says it all. I spent a bit of time searching their website and found one that I thought would fit. I sent them an e-mail with the dimensions of the current sprocket and asked them to check and confirm the sprocket I thought would fit would actually work. They checked and said it would so I ordered 2. They are located in California but I had the sprockets in a few days. Great service!
Anyway, I hope this helps. I have made a few other minor changes that have helped and would be happy to give you more detailed information if needed and can take pictures and send them along if you wish. (This goes out to all other members of this forum, of course!!)
Happy riding,
DogbertTheConsultant
Welcome to the Forum.
BOTTOMING OUT - They do tend to bottom out quite easily if you are riding in rutted areas. The skid plate to protect the back end is not very high off the ground and this is what you get caught up on. I recently did some minor modifications to our two. I bought bigger tires, Duro 19X8X7, and put them on and increased the ground clearance by probably a couple of inches or so. We are running the tires inflated to around 12 psi, a little higher than we probably should be but this has helped the ground clearance issue. They seem to be a better tire than the stock ones also.
HILLS / LOW END TORQUE - We have never had any problems with ours. They have been ridden in some pretty hilly areas and have done just fine. You do have to make sure you approach bigger hills with a bit of momentum. In addition to, and because of, changing the tires, we changed the rear sprocket. The bigger rolling radius of the tires caused us a bit of a problem, as we were told would happen by the shop we bought the tires from. The main issue was that in the 20 km range the engine would start to bog down due to the gearing being off. We changed from the 41 tooth sprocket to a 39 tooth sprocket and it made a world of difference. It does take a bit of top end speed off the ATVs but definitely helps the low end torque. Even if you don't change the tires, changing the rear sprocket would help the low end.
While doing these modifications I found a couple of excellent suppliers. The first one is ROYAL DISTRIBUTING (www.royaldistributing.com). They have a few locations in Canada, one of which is about 45 minutes from where we live, and the folks there are very helpful. I understand that they will ship to just about anywhere. They have a great on-line catalogue. This is where we bought the tires as well as a bunch of other miscellaneous items. My son and daughter, and my wife even, love the place. They go out of their way to help. Finding replacement parts for these units is not very easy and Baja are not much help in most cases. When I went to see them in their Guelph location we spoke with a young ATV racer who gave us lots of input. We explained our ground clearance issue and asked for suggestions and he was the one that told us not to go over 19 inches as it would have too much affect on the units. He also told us that we could change out the rear sprocket to counter the detrimental affects. When we took the sprocket off the one unit and went up to see them they kept it for a day and checked thru all their inventory to try to find us one. No luck though, which brings me to the next supplier.
SPROCKET SPECIALISTS (www.sprocketspecialists.com). The name says it all. I spent a bit of time searching their website and found one that I thought would fit. I sent them an e-mail with the dimensions of the current sprocket and asked them to check and confirm the sprocket I thought would fit would actually work. They checked and said it would so I ordered 2. They are located in California but I had the sprockets in a few days. Great service!
Anyway, I hope this helps. I have made a few other minor changes that have helped and would be happy to give you more detailed information if needed and can take pictures and send them along if you wish. (This goes out to all other members of this forum, of course!!)
Happy riding,
DogbertTheConsultant
Sep 6, 2006 | 05:16 PM
#328
Trailblazer
Joined: Sep 2005
Posts: 40
Likes: 0
Baja 90cc
Hi Camster,
The sprockets I ordered were 208Z-428-39 ($52.99 each) which is an aluminum 428 sprocket (chain type) with 39 teeth, 2 less than the one on the ATV as purchased. This sprocket is actually smaller than the stock one and does not have the offset that the stock ones come with. The offset on the stock sprockets is only around 5 mm. and the new ones do not appear to have any issues with the chain jumping off, I guess as long as there is sufficient play in the chain. Wear may increase slightly. As I explained in my earlier post, this was done to improve low end performance. Do you want to go bigger or smaller? I don't know for sure what going bigger would do but I would assume you would get less low end performance and more top end and I would also assume that there would be limitations to how much bigger you would want to go before it would drastically affect the performance of the 90s. You may want to talk to the folks at Royal Distributing. They have a store in Barrie which would probably be the closest one to you. They probably won't have the sprocket but should be able to help out, they were very helpful at the Guelph store. Check out their website for phone numbers, location, etc. The sprockets were purchased from Sprocket Specialists. These folks have a massive selection of sprockets.
Let me know if I can help out in any way.
DogbertTheConsultant
The sprockets I ordered were 208Z-428-39 ($52.99 each) which is an aluminum 428 sprocket (chain type) with 39 teeth, 2 less than the one on the ATV as purchased. This sprocket is actually smaller than the stock one and does not have the offset that the stock ones come with. The offset on the stock sprockets is only around 5 mm. and the new ones do not appear to have any issues with the chain jumping off, I guess as long as there is sufficient play in the chain. Wear may increase slightly. As I explained in my earlier post, this was done to improve low end performance. Do you want to go bigger or smaller? I don't know for sure what going bigger would do but I would assume you would get less low end performance and more top end and I would also assume that there would be limitations to how much bigger you would want to go before it would drastically affect the performance of the 90s. You may want to talk to the folks at Royal Distributing. They have a store in Barrie which would probably be the closest one to you. They probably won't have the sprocket but should be able to help out, they were very helpful at the Guelph store. Check out their website for phone numbers, location, etc. The sprockets were purchased from Sprocket Specialists. These folks have a massive selection of sprockets.
Let me know if I can help out in any way.
DogbertTheConsultant
Sep 7, 2006 | 08:41 AM
#329
Weekend Warrior
Joined: Sep 2005
Posts: 9
Likes: 0
Baja 90cc
Dogbert;
Thanks for the info. I actually want to go with a bigger sprocket; more bottom end torque at the sacrifice of top end speed. I'm pushing the weight capacity limit, so figured this would help the engine out a bit. (Best solution would be to get a 150cc some day.) I can at least start with the product number you have provided. I'll look at the offset issue; maybe it can be addrissed with a custom made spacer. Thanks also for the Royal Distributing info. (Guelph is closer to me than Barrie; Welland is east of you, near Niagara Falls).
Thanks for the info. I actually want to go with a bigger sprocket; more bottom end torque at the sacrifice of top end speed. I'm pushing the weight capacity limit, so figured this would help the engine out a bit. (Best solution would be to get a 150cc some day.) I can at least start with the product number you have provided. I'll look at the offset issue; maybe it can be addrissed with a custom made spacer. Thanks also for the Royal Distributing info. (Guelph is closer to me than Barrie; Welland is east of you, near Niagara Falls).
Sep 9, 2006 | 01:53 AM
#330
Trailblazer
Joined: Sep 2005
Posts: 40
Likes: 0
Baja 90cc
Hi Camster,
Sorry about the confusion in location, I had also replied to jef in Victoria Harbour (closer to Barrie) and got your locations mixed up. The guys at Royal Distributing in Guelph are very helpful. (One guy in particular was very helpful, a young guy who races/raced ATVs but I can't remember his name. I do remember that he had a real big scar on the inside of one of his forearms. My son might remember so if you are heading up let me know and I will try to get the guy's name for you.) The way I understand it is if you go down in tooth count on the rear sprocket you will get more torque, up in tooth count on the rear sprocket will increase top end. You can also change the sprocket on the motor but these sprockets are splined, and from what the guys at Royal told me, they are hard/harder to find (they don't carry them). There are formulas for calculating gearing ratios and such but that seemed way to technical. Good ol' trial and error works well enough. There is also a fine line as to how far you go before messing things up so I was told to make small changes and to make them one at a time. We changed the tires first and rode a bit. Discovered the effects of this change and countered them with the sprocket. The change we made definitely helped our situation with the bigger tires. No issues or detrimental effects to address at this time.
The offset could possibly be put back in with a custom made spacer but we didn't do this. I was thinking about it when changing them out but did not do it, there was a reason at the time but it escapes me at the moment. I think it might have had something to do with where the spacer would have to go and it possibly causing more problems than fixing, can't recall for sure. For one of our units the new sprocket actually improved the chain alignment. One of them had been built with the sprocket installed backwards with the offset in the opposite direction. I did not notice this until I started taking them apart. The lack of offset has not caused any problems thus far and hopefully won't.
We bought 2 of the 90s for our kids, son and daughter, but I tend to ride one with my son more than my daughter rides hers. I weigh around 180 (now, up and down a lot) and agree that heavier carcasses like mine due tend to take performance out of the 90s. The combination we have now works great for the whole family, wife included.
My mother-in-law lives in Wellandport and we trailer the ATVs down there once in a while to ride. Will have to keep in touch and maybe we can get out and ride together. Have also found a few local spots to ride as well as some locations with much better trails, locations and such, but these are at least a couple hour drive from here. Hope to get out to these newly found spots this month, time allowing, and putting some miles on the ATVs.
Good luck and let me know if I can be of any further help.
Take care,
DogbertTheConsultant
Sorry about the confusion in location, I had also replied to jef in Victoria Harbour (closer to Barrie) and got your locations mixed up. The guys at Royal Distributing in Guelph are very helpful. (One guy in particular was very helpful, a young guy who races/raced ATVs but I can't remember his name. I do remember that he had a real big scar on the inside of one of his forearms. My son might remember so if you are heading up let me know and I will try to get the guy's name for you.) The way I understand it is if you go down in tooth count on the rear sprocket you will get more torque, up in tooth count on the rear sprocket will increase top end. You can also change the sprocket on the motor but these sprockets are splined, and from what the guys at Royal told me, they are hard/harder to find (they don't carry them). There are formulas for calculating gearing ratios and such but that seemed way to technical. Good ol' trial and error works well enough. There is also a fine line as to how far you go before messing things up so I was told to make small changes and to make them one at a time. We changed the tires first and rode a bit. Discovered the effects of this change and countered them with the sprocket. The change we made definitely helped our situation with the bigger tires. No issues or detrimental effects to address at this time.
The offset could possibly be put back in with a custom made spacer but we didn't do this. I was thinking about it when changing them out but did not do it, there was a reason at the time but it escapes me at the moment. I think it might have had something to do with where the spacer would have to go and it possibly causing more problems than fixing, can't recall for sure. For one of our units the new sprocket actually improved the chain alignment. One of them had been built with the sprocket installed backwards with the offset in the opposite direction. I did not notice this until I started taking them apart. The lack of offset has not caused any problems thus far and hopefully won't.
We bought 2 of the 90s for our kids, son and daughter, but I tend to ride one with my son more than my daughter rides hers. I weigh around 180 (now, up and down a lot) and agree that heavier carcasses like mine due tend to take performance out of the 90s. The combination we have now works great for the whole family, wife included.
My mother-in-law lives in Wellandport and we trailer the ATVs down there once in a while to ride. Will have to keep in touch and maybe we can get out and ride together. Have also found a few local spots to ride as well as some locations with much better trails, locations and such, but these are at least a couple hour drive from here. Hope to get out to these newly found spots this month, time allowing, and putting some miles on the ATVs.
Good luck and let me know if I can be of any further help.
Take care,
DogbertTheConsultant