cutting arms off a primary Drive on a E50

i wanna do this, understand that it's going to lose alot of integrety and most likely will fail, but has anyone else done this?

ideas, critizism, past experiences all welcome.

`SABAT!

Re: cutting arms off a primary Drive on a E50

Have not done it. But I did find this guys blog when searching for build ideas for my magnum I have in the works. There is a pic like 3/4 down the page of exactly what your asking about. Maybe try and ask him for info.

Re: cutting arms off a primary Drive on a E50

Shit forgot the link! http://50cc60mph.blogspot.com/

Re: cutting arms off a primary Drive on a E50

whoa hoh ho it was Harold, ill expect him to chime in.

i already had 4 oz taken out of the clutch bell, if i do the primary drive does that mean my motor will be very un-balenced because im running a stock (5lb) flywheel/ignition?

will i have to upgrade to HPI?

`SABAT!

Re: cutting arms off a primary Drive on a E50

sorry for hugeness, but this is what im going for.

how unbalenced is this all going to be?

~SABAT!

Re: cutting arms off a primary Drive on a E50

damn it

previous statment of hugeness

Re: cutting arms off a primary Drive on a E50

here fail

1239342803_main_gear_lightened.jpg

Re: cutting arms off a primary Drive on a E50

You are removing weight from something directly attached to your rear wheel. Why not just removing 1/3 of the spokes from the rear wheel instead or add a some weight reduction holes in the rim. You could also find a really light weight chain to run and save weight there.

-naz

Re: cutting arms off a primary Drive on a E50

you gotta be able to see that the output shaft doesn't start spinniing until _after_ the clutch engages. The rotating mass that you want to lighten is the mass on the crank, thats whats spinning. The clutch and magneto would be better places to seek weight to lose.I could see it giving you that extra .01% at the top. but not really.

Re: cutting arms off a primary Drive on a E50

If you already lightened the clutch bell. Take some weight off the magneto as well as chopping the primary drive you might make some good gains. Have you checked out Treats new Puch cdi ??

Player Made! but I dunno if it is much lighter? About balance of your motor, thats a gamble.

I would be worried about that primary drive failing in one of the unsupported areas. But hey, WTF do I know (not much)

Re: cutting arms off a primary Drive on a E50

any method to lightening a flywheel?

~SABAT!

Re: cutting arms off a primary Drive on a E50

Replacing it with an aluminum rotor would be the most effective choice.

Re: cutting arms off a primary Drive on a E50

You can really reduce the flywheel weight by getting an HPI. ha.

Re: cutting arms off a primary Drive on a E50

^ the mod was done BECAUSE he used a HPI, to balance the inner and outer weight.

Re: cutting arms off a primary Drive on a E50

yeah true true, HPI's are like 200 bucks tho, that's never gonna happen.

`SABAT!

Re: cutting arms off a primary Drive on a E50

Ben Van Zoest /

I could never figure WHY Puch beside keeping a gear manufacture in business used the antiquated gear setup whiles american builders already had changed to chains, later on to cog belts. Meanwhile we are stuck w/t noise, stress and inefficiency of the gear drive..

Re: cutting arms off a primary Drive on a E50

so true, i should make a pedal sprocket into a drive, i wonder how long that would last.

~SABAT!

Re: cutting arms off a primary Drive on a E50

I.R.E. Mike Pee /

Just hacked mine last week, but haven't run it yet.

I was surprised to find that a plain ol dremel cutoff wheel got through it alright. Only broke one doing the three. I just didn't want to use a full size grinder, slip and take chunks outta where I didn't want chunks gone. I bet the cutoff wheels meant for metal would work lots better...or at least the reinforced ones. haha

Re: cutting arms off a primary Drive on a E50

glad i saw this thread, meant to get around to doing it while I have my case open, this just worked as a good reminder! yay

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