HELP ME before I set fire to it!! By 2stroked (Read 1,047 times)

[2stroked]

First, it's been a while since I have been here. I am back though

Okay, let me set it out for yas: 2008 MC 54 250B Linhsi based engine. Yesterday, after about a two mile WOT or close to WOT run, I noticed a terrible shake and shudder on take off. I had been through this before on my two stroke, so I pretty much knew what was wrong. When I got it home, I pulled the CVT cover, and sure enough, a roller had managed to work it's way loose, and jammed the vari. No big deal, right? Ha! Wrong!

I was able to pull the clutch easily. The nut on the vari is so dang tight, that an impact gun won't budge it. I have a holder, that I made for all three if my bikes, so I gotnit out and tries it with a breaker bar.Nope, uh uh, not happening. Instead if the nut coming off, one of the " holder holes " ( for lack of a better term ) broken off if the vari fan.

Has anyone else had this much trouble getting one of these loose??? If so, how did you finally get it off??? I am stuck here....... The Helix is down, waiting in a radiator and intake, and I live twelve miles from town, so the two stroke with a BBK and expansion chamber pipe is kinda small for daily trips to town.


SOMEBODY PLEASE HELP ME!!??!!

Chris

[Alleyoop]

The impact wrench should work like a charm IF it is one with at LEAST 200+ Ft Lbs of torque.

Also I do not believe shake rattle and roll is due to a weight I would check your clutch pads they are GLAZED and like a mirror and slip when taking off until enough centrifugal force is applied to grab the bell without slipping. Very Common on the 250s so just get some fine sandpaper and take the glaze off.
But it will always come back due to the weight it has to move from a standstill.

[2stroked]

Apr 27, 2016 13:27:04 GMT -6 Alleyoop said:

The impact wrench should work like a charm IF it is one with at LEAST 200+ Ft Lbs of torque.

Also I do not believe shake rattle and roll is due to a weight I would check your clutch pads they are GLAZED and like a mirror and slip when taking off until enough centrifugal force is applied to grab the bell without slipping. Very Common on the 250s so just get some fine sandpaper and take the glaze off.
But it will always come back due to the weight it has to move from a standstill.

Impact ( off brand ) + air compressor @full pressure ( the things as old as me, the pres. guage is all hazed up ) and NODDA. The impact and compressor unit have never let me down before. They belong to my uncle, but he takes great care of all of his tools, and I have used them several times. The compressor uses a 3hp electric (220) motor and has a four foot long by about a foot and a half around tank. I am not positive on the force of the gun, but am sure it's over two hundred pounds.

With the locker tool braced against the floor, I can lift the bike with a breaker bar. And that's not straight up, but up and forward. These dmn things aren't reversed threads are they?? I didn't think so, but at this point, nothing would surprise me. I might have to wind up cutting the dmn thing off. Idk.

Any help would be great. I have tried everything I can think of. Penetrating oil, impact wrench, breaker bar, ratchet and pipe, heat, what else is there??? Are these cranks threaded with a common thread that would make it easy for me to replace this nut from the local hardware store?

[2stroked]

Oh, sorry, I already replaced the clutch a couple months ago, ( had it done in January ) and when I looked, the pads didn't seem to be hazed, and they have plenty friction material left, and look pretty dmn even for Chinnese products.

The old clutch was wore to the arms, so the bell is new too. Now starting to seem I will need a new vari fan as well, as one of the holder holes has broken out, as well as a couple fins. Not sure, but think that might cause a balance issue.

[Alleyoop]

Yes broken fins on the fan pulley will cause vibration issues and can eventually damage the crank bearings. The Variator nut is a m14x1.50

www.scooterpartsexpress.com/standard-parts/250cc-4t-172mm-cf250-ch250-gy6-250-liquid-cooled?sort=rating&order=DESC&page=2

[2stroked]

I figured as much.

Thank you for the link. I appreciate your help.

[2stroked]

I had to cut the dang nut off. But I finally did get it off. I never pulled the belt out of the vari, cuz I wanted to see what was going on in there, without me causing all of the rollers to shift.

When I did get it out, once the back plate was off, I could see one stupid a$$ roller that most certainly did shift out of track. No big surprise, considering the amount of friggin axle grease that was inside the ramp plates. I would live to meet the man that did that, so I could kick him in the teeth. I have been cleaning this thing for over an hour, and still haven't got all the grease out.

I took pics of most of the process, if there is any intrest, I will post links.

[2stroked]

Also, I checked the friction pads, just to be safe, and they were still rather dull. They have started to Haze in a couple spots, but all in all looked good. I can see where the old clutch had cooked the bell, it's mostly blue and purple. HOT.


Not going to disassemble the centrifugal unit, but was wondering, are these T.D.'s groves like the little scoot units???

[2stroked]

Figured I would share a bit of my nightmare.

www.dropbox.com/sc/hh19h1qmdyemab2/AABfULVuwPMCsA5opUUeoZlBa

Check out the butt load of heavy grease in there. I cleaned it all out, put in new grease seals, and a very little bit of grease in the boss, and dusted the rollers,ramps,ramp plate and the guides, with graphite powder.

[jct842]

graphite powder should be as good as it gets for lube, even dirt doesn't seem to stick to it.

[2stroked]

Personally I love the graphite powder. I first used it while working as a property manager for a real estate company. There I used it in sticking locks.

Now, I keep finding new and inventive purposes and uses for the stuff. I love it, the graphite powder seems to drastically cut the friction CO efficient on anything it comes in contact with.

Wonder how heat effects this stuff???

Was also wondering how it would work on or in ceramic bearings.

[Alleyoop]

All the 250s+ Variators with the cover come loaded with grease.

What in the world it that small weight was that in there??

[2stroked]

Alleyoop, that was a variators weight for a 1e40qmb as a comparison for some friends at 49ccscoot.com

[Alleyoop]

OH, HAHAHAHAHA, i was about to say WOW!! someone did not know what they were doing (LOL)

[2stroked]

Oh, also, as a side note, the Linhai engines most certainly use a M 14 x1.0 crank nut. The same as most BMX style axle nuts.

Found out the hard way, I bought a 14x1.5 and there was no way in he!! it was going to work.


I don't know for a fact that all Linhai engine clones are going to use this nut, but this one does. Figured I would post that incase somebody stumbles on this thread and needs to know.


Thank for everything everyone, thank for making me feel at home Alleyoop