Gear mesh problem with Mugen MBX5-T, engine is too far forward?
#1
Gear mesh problem with Mugen MBX5-T, engine is too far forward?
I have a Mugen MBX5-T with a Picco P3-28, and I am having some gear mesh, or better said "clutch bell position" issues. I can get the gear mesh set properly, however the spur/clutch bell teeth mating position is off. Basically, the engine sits too far forward, and the spur gear has a couple millimeters of the teeth not contacting the clutch bell, and the spur is very close to the bell itself. I am using a BCE chassis, and I dremel'd it a bit to move the motor mount back some, but it hardly helped. I also have to clutch bell shimmed as close to the flywheel as it can be without rubbing the flywheel pins. Anyway, the biggest problem about this is that it's starting to mess up the teeth on the clutch bell and spur gear. I cant seem to find a clutch bell that has the teeth machined right against the bell, which I think would almost solve my problem. Do Picco's just have a long crank and I would be better off to switch engines? Has anyone else had this problem? How did you fix it? And does anyone know of a company that makes an adjustable motor mount (allowing the engine to slide forward or backward) for the MBX5-T, or a motor mount that is adjustable from another vehicle that uses the same hole pattern that the chassis has? (I tried my OFNA ones and they don't work)
Anyway, thanks for any suggestions or help!
Anyway, thanks for any suggestions or help!
#2
Tech Adept
iTrader: (39)
Check to make sure the flywheel is seated as far back on the crankshaft as possible.
Sorry, that's the only advice I have. Kinda new, dunno the difference in motors/clutchbells yet.
Hmm, actually, I think Kyosho's have a more shallow clutch bell than some other cars. Not sure if that means changing the flywheel and everything or what though....
Sorry, that's the only advice I have. Kinda new, dunno the difference in motors/clutchbells yet.
Hmm, actually, I think Kyosho's have a more shallow clutch bell than some other cars. Not sure if that means changing the flywheel and everything or what though....
#3
What kind of shimming did you have to do to get the screw on the end of the crank shaft? Assuming that the crank is "normal", when you put the brass collet, fly, fly nut, shims, bearing, clutch bell, bearing, shims, then screw/washer on the end, it should be close. How far off are we talking? Can you post pics? If you used the shimming your manual suggested for the clutch bell assembly, perhaps your spur is on the center diff backwards? If the shimming was way off, perhaps your collet is wrong?
#4
Check to make sure the flywheel is seated as far back on the crankshaft as possible.
Sorry, that's the only advice I have. Kinda new, dunno the difference in motors/clutchbells yet.
Hmm, actually, I think Kyosho's have a more shallow clutch bell than some other cars. Not sure if that means changing the flywheel and everything or what though....
Sorry, that's the only advice I have. Kinda new, dunno the difference in motors/clutchbells yet.
Hmm, actually, I think Kyosho's have a more shallow clutch bell than some other cars. Not sure if that means changing the flywheel and everything or what though....
What kind of shimming did you have to do to get the screw on the end of the crank shaft? Assuming that the crank is "normal", when you put the brass collet, fly, fly nut, shims, bearing, clutch bell, bearing, shims, then screw/washer on the end, it should be close. How far off are we talking? Can you post pics? If you used the shimming your manual suggested for the clutch bell assembly, perhaps your spur is on the center diff backwards? If the shimming was way off, perhaps your collet is wrong?
I think the spur gear being installed backwards is probable here, and I will be sure to check that out.
I can't post pictures right now, but I will have access to a camera tonight and will post some pictures tonight.
#5
Tech Apprentice
I just had a similar issue where i did not like how the clutch bell engaged with the main gear. I ended up trying different collets i had and the flywheel engaged them all a little differently. the teeth are almost dead center now.
#6
Are you using and actual mugen flywheel nut + collet + clutch bell. I have seen a few people (myself included the first time) try and use the HPI or some other similar cluch style nut. The mugen nut is shorter then most. I ran 1 small shim behind the clutch bell and the rest in front of it. And yes this is in my mbx5t with a BCE chassis as well. I also always used the 1 pice engine mount. Dremeling the holes is useless the BCE chassis holes are all in the correct location.
#9
Opps I did mean to say flywheel and not clutchbell. I have used ofna clutch bells they work fine. But the flywheel, collet, and nut should be acutal mugen.