a few issues with my kh125

[kawakamelion]

i am currently in the process of replacing my piston(it had a little finger sized hole in the top) and have decided that maybe its time to fix some of the other little problems with the bike but i don't have all that much knowledge of bikes (this is my first). so sometimes when i try to go from 2-3 or 3-2 i end up in neutral, i have no idea why, any ideas would be helpfull. thanks

[The Artist]

That is something you are unlikely to be able to change or fix.

Make sure your gear lever is adjusted properly and just push hard when you change.

[kawakamelion]

i thought as much, also what with my piston going i think i may have a fair bit of crap in the bottom end, is there a way to easily get it out or will it be fine to leave it?

[The Artist]

[suzukirider19...]

[The Artist]

[kawakamelion]

i think i will try the fuel method, is it advisable to do this repeatedly or will just once do it?

[The Artist]

[kawakamelion]

i'm not sure i do, could take it to a garage but i am prety much skint, take it there's no other way to ensure i dont maul the engine otherwise?

[kawakamelion]

oh and on an unrelated matter, is it advisable to soak my top end in hot water to clean it?

[The Artist]

There is no way to ensure the bottom end is free of debris without inspecting it.

Soaking your top end in water will do nothing. Just make sure there is no debris from your piston still in the engine.

[kawakamelion]

found someone to help me split the crankcase for cleaning, but he advised me that it is neccessary to have the cylender rebored, i cant see any damage to the topend but he thinks i will have to do this anyway, i am working to a very tight budget and would rather not, what do you think?

[The Artist]

Can't say without looking. Ideally yes because it could be damaged but you can't really know without stripping it down and using your finger to feel for any scores.

[kawakamelion]

oh well, i suppose i'm aswell to do this anyway, thanks for all your advice, you have no doubt saved my poor little bike a lot of harm from my inexperience

[bladerunner]

To clean out the bottom end....half fill the crank case with paraffin or kerosene, spin the crank a few times using the conrod by hand and flush. Easy way is lay the bike over and catch the paraffin in a container to inspect debris after its settled. Do this untill the bearings sound clean ( no grinding noise or rumbling ) when you turn the crank .... Repeat Untill no more debris comes out. If you can give it a blast with an airline to dry it off and remove any residue.
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's

[unitynotsocri...]

if you dont need to have the bike up and running then ,rebuild the engine,

especially as it is a historic bike.....

won't cost too much to learn to rebuild it,a gem of an engine.

Don't know how old you are but ,not...splitting the cases and rebuilding it.......is nearly as bad as my terrible crimes against motorcycling history ...... trashing mk1 cg's,honda 50 grandad stepthru's and 70's 125,175,250's,kwack 400 triples,suzuki 380 and a few brits..........all driven to destruction and dumped in the rivers and canal s of greater manchester....my shame..as an older man.
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nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS