We have 75 125 ke. my son developed a problem where as soon as you release the clutch , it surges forward then dies instantly, i've tried adjusting clutch cable but with the same results, could this be a gear problem?

It sounds like you have a blown throw out bearing for the clutch operation. Fix it soon or you'll do a whole lot more damage to the drivetrain.

The engine is running too rich. The carburator needs tuning to get the fuel mixture correct or the choke may be stuck in a partially closed position.

have you tried adjusting the cylinder? there is a screw to adjust it by underneath the clutch pedal, had the same problem in my stealth

I've found that excessive water pressure in the pipes can cause vibration and phantom sounds coming from the plumbing. If water pressure seems to be excessive, adjusting down the main supply line can be a easy as turning as turning the main valve a few degrees in either direction.

When you say it wants to lunge forward do you mean the clutch doesn't disengage the transmission from the engine or that when you release th clutch, it tries to jump (i.e. clutch doesn't release smoothly)? If it's not disengaging the transmission, you may need to adjust the clutch at the engine using the screw and locknut. If it isn't releasing smoothly, the clutch plates could be either contaminated or the release plates weren't installed with even spacing.

When you've got the clutch off and you're turning the mainshaft by hand backwards and forwards, it feels like a lot. I've never measured it but it seems like it's about a half turn or so. What you are doing when you turn the mainshaft backwards and forwards with the transmission in gear is you're moving the dogs of the first gear clutch dog in the transmission back and forth in the slots that it the dogs fit into. They have to have enough room to slide into the slots but when it the engine is running. the dogs go all the way to the backside and stop. Unless you're having a problem with the transmission, don't worry about this back and forward movement.

Good Luck
Steve

Remove cover and check if you can rotate the clutch centre without the outer moving, this would suggest the clutch centre has not seated correctly or the pushrod or opperating lever is not allowing it home all the way, i presume you measured the thickness of the clutch plates before hand

Dude, I have the same problem, have tried the same solutions as you. No luck yet. Maybe timing? That's my next try. [email protected]

Many folks have found that a defective relay in this mower to be the cause of the "stall when i take my foot off the clutch" issue. The relay is connected to the safety switches which turn the mower off when no one is in the seat, etc.

Sounds like your clutch is stuck on [not disengaging when you pull the leaver]This can happen over a long storage-no use period.To fix put the bike in 3rd gear and start the engine with the clutch lever pressed[caution the bike will want to surge forward so keep your foot on the brake]Make shure to have the engine up to normal running temperature before you try this fix.the engine firing along with the brake pulled will release the sticking clutch plates.This will work!!!