BradLoomis
04-23-2007, 12:46 PM
I don't know how all of the finger pointing and he said/she said stuff gets going and gets deleted... but here is the tranny bearing that was talked about in the "fastest motor" post. I presented it to Billy about a year or so ago and to Shane a few monthes ago. I have told quite a few people on here about it... but I never fomally posted it along with my testing because I didn't want it to get into a my shop/builder can beat up you shop/builder post.
The bearing comes from Slovakia: INA NK 25/16
http://i216.photobucket.com/albums/cc52/X-Stream_Composites/Loomis%20Racing/IMG_1508.jpg
I have been running them now for over a year and a half. You don't need to modify anything in the cases. You also don't have to reinforce the cases anymore.
http://i216.photobucket.com/albums/cc52/X-Stream_Composites/Loomis%20Racing/IMG_1507.jpg
It has a thick hardened steel outer race(leftside of picture) -vs- the stamped steel band (rightside of picture)that comes on the standard bearing,that allows the bearing race to flex inturn puts all of its' force into the casing that then cracks. This allows the output shaft to move which then cracks the teeth upon the hit of the throttle and misaligned teeth.
We first designed and built an outer sprocket holder that actually had a bearing on the very outside of the sprocket. This worked well but wasn't very user friendly. Then I tired the bushing insert out of brass and then aluminized bronze. These also worked well but robbed a little horsepower on the topend fastest speed because of hydraulicing of the gear oil between the shaft and the bushing. Use a thin oil to reduce hydraulicing and then there is no cusion between the gears. Thicker gearlube for cusioning and you get no lube or hydraulicing at high speed.
Now this is the only probelm that we are having.
http://i216.photobucket.com/albums/cc52/X-Stream_Composites/Loomis%20Racing/IMG_1524.jpg
I have always tried to help people the same as Billy Holt has and Shane also has. So hopefully this can help other parents fix some other problems on these bikes.
But remember... Tranny Saver, Tranny Bushing, Cryogenic Gears, INA Bearing... These motors were/are designed for mopeds. When you push things to the limits that these can be... things are going to break. That is why WRH and Wolfpack are hopefully trying to stay one step ahead of us weekend warriors and setting the standard for all of us to purchase the best products that all of the mini world has to offer. If I can help anymore don't hesitate to ask.
The bearing comes from Slovakia: INA NK 25/16
http://i216.photobucket.com/albums/cc52/X-Stream_Composites/Loomis%20Racing/IMG_1508.jpg
I have been running them now for over a year and a half. You don't need to modify anything in the cases. You also don't have to reinforce the cases anymore.
http://i216.photobucket.com/albums/cc52/X-Stream_Composites/Loomis%20Racing/IMG_1507.jpg
It has a thick hardened steel outer race(leftside of picture) -vs- the stamped steel band (rightside of picture)that comes on the standard bearing,that allows the bearing race to flex inturn puts all of its' force into the casing that then cracks. This allows the output shaft to move which then cracks the teeth upon the hit of the throttle and misaligned teeth.
We first designed and built an outer sprocket holder that actually had a bearing on the very outside of the sprocket. This worked well but wasn't very user friendly. Then I tired the bushing insert out of brass and then aluminized bronze. These also worked well but robbed a little horsepower on the topend fastest speed because of hydraulicing of the gear oil between the shaft and the bushing. Use a thin oil to reduce hydraulicing and then there is no cusion between the gears. Thicker gearlube for cusioning and you get no lube or hydraulicing at high speed.
Now this is the only probelm that we are having.
http://i216.photobucket.com/albums/cc52/X-Stream_Composites/Loomis%20Racing/IMG_1524.jpg
I have always tried to help people the same as Billy Holt has and Shane also has. So hopefully this can help other parents fix some other problems on these bikes.
But remember... Tranny Saver, Tranny Bushing, Cryogenic Gears, INA Bearing... These motors were/are designed for mopeds. When you push things to the limits that these can be... things are going to break. That is why WRH and Wolfpack are hopefully trying to stay one step ahead of us weekend warriors and setting the standard for all of us to purchase the best products that all of the mini world has to offer. If I can help anymore don't hesitate to ask.