Clutch slipping when expansion pipe kicks in

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Nanfoe

Member
Oct 15, 2016
39
5
8
Florida
I've managed to build a Super Rat from scratch meaning I bought the bottom end and everything else individually and successfully assembled. Now after achieving 49.5 the clutch can slip nasty if i don't ease into high RPM's. Smelling like burnt breaks heh. Anyhoo the rat bottom is stock from what I know. The motor head is a 6 cc with a solid copper gasket, also 26 tooth, a small reed valve with the champion carb with a #88 jet which BTW the plug never seems to look rich. I'm running Opti 2 @ 3 oz per gal. Oh and the jug is worked with 3rd reed port, transfers cleaned, ported intake and exhaust with a windowed piston that I cut and the original piston rings from that piston. I got a reading of 190 PSI from this build. She's running soooo good that the guys who race them by my way won't run one with me, they say I ain't ready, I just wanted to see how fast mine was compared to theirs. So this is my problem, the clutch slips if I don't ease off when the pipe kicks in. If I just cruise normal she's good. Can you see anything wrong with my set up? I've already looked at your clutch instructions so I'm just wondering If I can get away with loosening or tightening the butterfly. I'm so close to getting it right I love it thanks in advance.

Update: loosened the clutch cable and went for a ride and seems to not slip but still smells like it so I'm gonna change the pads since they may be bad.
 

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Barnfresh

Member
Sep 5, 2011
205
10
18
Nor-Cal
All I have is the dead link listed my friend is trying to source here in the US. If anyone finds someone importing now please post here.
 

user54508

Member
Feb 3, 2021
96
78
18
I know this is an older thread. But this is relevant to your questions and cheaper!
I am in search of a new clutch plates. one of the higher end type for use with these pads they work really well just plate and stock springs. a set of these even grips the stock plate well on my minarelli issue is the stock plates are never flat and end up wearing funky!