Re: Sean Colliers KX500 Project "I was only going to inspect the top end"
Posted: Fri Oct 21, 2016 4:49 am
So here is a little info on the wheels and swing arm. After my buddy Tommy Roberts mounted the new rubber I found a few loose spokes and tightened them. Thanks to Pivot Works I had all the bearing kits needed for the steering stem, both wheels, shock, shock linkage and the swing arm. Scrubbed down the swing arm with some degreaser and a Scotchbrite pad.......Inspected and tightened the rim locks using a torque wrench and mounted a new 45 tooth rear sprocket. With all new bearings throughout the bike, new tires and all the love and attention to detail from the boys of KX Guru Racing, the Beast will be better than new.
Story on the sprockets........
Sean was running typical MX gearing 14/51. The 51 tooth rear sprocket was large to the point that it would drag the chain at a downward angle across the bottom of the chain guide. The chain had finally eaten through the lower chain guide slider, both bolts and completely out the bottom of the chain guide during our last ride. Fortunately I had this chain guide and 2 others on hand. I was able to make one really good serviceable chain guide out of the 3 and that's what's on there now. Talk about a budget build!! But it is solid, mechanically sound and not bad looking.
During the KX Guru Racing test session I had with Sean (video link below) he rode my bike with 13/45 gearing and absolutely loved it. He said that he could feel the chain rub on his bike and not on mine. He also liked the shifting characteristic and power delivery that my KX500 had with 13/45 gearing and stated that he wanted that same gearing on the Beast. With a 45 tooth on the rear we should eliminate the issue of the chain drag across the bottom of the chain guide at such an extreme angle.
https://youtu.be/U1m3jJgygC4
Story on the sprockets........
Sean was running typical MX gearing 14/51. The 51 tooth rear sprocket was large to the point that it would drag the chain at a downward angle across the bottom of the chain guide. The chain had finally eaten through the lower chain guide slider, both bolts and completely out the bottom of the chain guide during our last ride. Fortunately I had this chain guide and 2 others on hand. I was able to make one really good serviceable chain guide out of the 3 and that's what's on there now. Talk about a budget build!! But it is solid, mechanically sound and not bad looking.
During the KX Guru Racing test session I had with Sean (video link below) he rode my bike with 13/45 gearing and absolutely loved it. He said that he could feel the chain rub on his bike and not on mine. He also liked the shifting characteristic and power delivery that my KX500 had with 13/45 gearing and stated that he wanted that same gearing on the Beast. With a 45 tooth on the rear we should eliminate the issue of the chain drag across the bottom of the chain guide at such an extreme angle.
https://youtu.be/U1m3jJgygC4