heathyoung
Member
- Local time
- 4:33 PM
- Joined
- Jul 30, 2008
- Messages
- 185
Hey all... I'm sure everyone has this issue but anyways... Maybe I have worse luck 
Setup is an Australian sourced (from china?) Gebe knockoff, with a 31cc ~1hp (700W eep!) 4 stroke, 16 tooth drive pulley (to keep rpm low so it doesn't exceed 200W limit).
So far... Belts come off regularly - alignment is OK, tension is OK, problem comes from the lack of a dynamic tensioner (as per Gebe design). Made up my own dynamic tensioner with two bearings, some scrap metal, a spring and some bolts and nylock nuts - solved.
Stupid engine has to be tilted back too far, and the fuel filler leaks fuel out as a result. Made up a cradle from scrap aluminium and turned it around so the filler faces the front of the bike, not the rear. Tygol hose is expensive, but good stuff!
Sum-ting-wong brand sparkplug dies without warning, replaced with NGK, no problems. Revs better.
Backfire blows airfilter housing off in traffic, gets run over by a truck, unrecongisable now. Replaced entire housing with cheap pitbike K&N knockoff + 40mm plumbing end cap. Noiser, but revs better.
Fuel filter picks up air (very bulky design) when tank low. Replaced with smaller 'whipper snipper' type.
Bolts always fall off/bend. Replace with good quality high tensile bolts, with lock washers etc and nylock bolts.
Sheared off weld on clutch going downhill. Really poor penetration on weld. Stupid drive pulley kept unscrewing itself on the way home, had to keep on the throttle and brake to stop it. Got the local exhaust guy to weld it back on, much better job.
Positives: Gets me to work on time with some exercise, costs about $3.00 per week in fuel as opposed to $50 per week in the car. Clutch is holding up very well, expected a lot more wear the way I ride.
I'm not sure what else is left to break
Negatives: very little power due to poor gearing - I'm going to get an 11 tooth I think - to better suit the motor and the very steep hills I have to push the bike up (grrr...) Engine is cantakerous, always starts, but when it gets good and hot, tends to ping (even on 98 octane) and leans out + misfires.
'Shoulda bought a gebe with a tanaka, or built my own (which is what I am in the process of doing - slowly - probably using this engine and a CVT).
Anyone else have as much luck as me?
Cheers
Heath Young
Setup is an Australian sourced (from china?) Gebe knockoff, with a 31cc ~1hp (700W eep!) 4 stroke, 16 tooth drive pulley (to keep rpm low so it doesn't exceed 200W limit).
So far... Belts come off regularly - alignment is OK, tension is OK, problem comes from the lack of a dynamic tensioner (as per Gebe design). Made up my own dynamic tensioner with two bearings, some scrap metal, a spring and some bolts and nylock nuts - solved.
Stupid engine has to be tilted back too far, and the fuel filler leaks fuel out as a result. Made up a cradle from scrap aluminium and turned it around so the filler faces the front of the bike, not the rear. Tygol hose is expensive, but good stuff!
Sum-ting-wong brand sparkplug dies without warning, replaced with NGK, no problems. Revs better.
Backfire blows airfilter housing off in traffic, gets run over by a truck, unrecongisable now. Replaced entire housing with cheap pitbike K&N knockoff + 40mm plumbing end cap. Noiser, but revs better.
Fuel filter picks up air (very bulky design) when tank low. Replaced with smaller 'whipper snipper' type.
Bolts always fall off/bend. Replace with good quality high tensile bolts, with lock washers etc and nylock bolts.
Sheared off weld on clutch going downhill. Really poor penetration on weld. Stupid drive pulley kept unscrewing itself on the way home, had to keep on the throttle and brake to stop it. Got the local exhaust guy to weld it back on, much better job.
Positives: Gets me to work on time with some exercise, costs about $3.00 per week in fuel as opposed to $50 per week in the car. Clutch is holding up very well, expected a lot more wear the way I ride.
I'm not sure what else is left to break
Negatives: very little power due to poor gearing - I'm going to get an 11 tooth I think - to better suit the motor and the very steep hills I have to push the bike up (grrr...) Engine is cantakerous, always starts, but when it gets good and hot, tends to ping (even on 98 octane) and leans out + misfires.
'Shoulda bought a gebe with a tanaka, or built my own (which is what I am in the process of doing - slowly - probably using this engine and a CVT).
Anyone else have as much luck as me?
Cheers
Heath Young
