Originally Posted by Rapid Roy

My belt actually runs against the bottom of my exhaust header. I haven't had any problems running it this way. I was pretty nervous at first though. I kept playing with the tensioner trying to keep the belt from rubbing, but ended up running it looser. Tightening up the belt too much will cause premature wear to the belt, gears, and bearings. It will also tighten up the drivetrain too. I keep thinking that I could take my dremel and remove a bit of the flange so the belt won't rub, but keep forgetting since there havent' been any problems.

Originally Posted by ChrisR40

thank you for helping me with my clutch setup and this past weekend during the 3rd heat I hit the wall (board) and cleanly broke my right front drive axle. No twist marks just a clean break. Has anybody had that happen to them before??

Originally Posted by IBRCing

I've noticed after running my R40 in a 5 minute race it is completly covered in tire dust. At first I thought this was good because it meant I was getting good traction. But now I'm thinking the dust is coming from the tires not gripping that well and thus sliding around so much it covers my car in dust. Anyone have any comment...
I run 26mm 42 shore fronts, 30mm 37 shore rears, suspension set-up is by the manual.

Originally Posted by AMGRacer

There will never be a situation where leaning the bottom end will prevent a motor from running on after a burst of WOT. The run on is caused by the motor being somewhat lean already after the WOT run, or it sometimes is caused by the motor pre-detonating due to hotspots on the combustion chamber or plug, or very rarely can be caused by a wierd gas flow situation due to the pipe. It is never caused by a rich bottom end.

Originally Posted by IBRCing

I've noticed after running my R40 in a 5 minute race it is completly covered in tire dust. At first I thought this was good because it meant I was getting good traction. But now I'm thinking the dust is coming from the tires not gripping that well and thus sliding around so much it covers my car in dust. Anyone have any comment...
I run 26mm 42 shore fronts, 30mm 37 shore rears, suspension set-up is by the manual.

Originally Posted by Artificial-I

That reminds me, I just put my D3R in my r40 and im noticing the exhaust port is lower than regular motors. Ive pretty much now have my side brace tensioner set as tight as it can go.

It still looks pretty close. I guess this is a warning as there really is nothing else to do. If you get a d3r youll need to get the cf brace or modify your stock one to pull the belt away more from the exhaust.

Im just having a heck of a time finding a motor that fits good.

Another thing with this motor is also the carb runs very close to the brake disc. But the good thing the carb can pretty much fully rotate without hitting the idle screw.

Originally Posted by ChrisR40

good to know I am not the only person to ever snap one and were do you find the wider bumper??

Originally Posted by WeatherB

I made my own! Seems like my bumper is the center of attention at the track though. 1/2 the guys love it while the other 1/2 make fun of it. I have yet to break anything after 3 races so they can make fun all they want!

Originally Posted by Artificial-I

Holy RC Death Zone! Those cinder blocks must be horrible on the cars. They should use something that gives a little.

Originally Posted by WeatherB

The blocks aren't bad, they do give a little. Also, the track is made out of PVC pipes so those give too.