Kickstarter problems (125cc gpx)
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my67xr
Miniriders Legend and Master Spanner Spinning Mode
can you measure the hole in the case where the end of the kickstart shaft sits?
and then measure the end of the kickstart shaft?
is the bearing ok where the sprocket drive shaft goes through on the secondary side of the gearbox?
otherwise it may just be a case of bad machining, on my spare lifan 125 case i took a pic.
is the hole where the kickstart shaft sits central to the raised boss?
mine is maybe 1.5mm - 2mm forward of centre.
if you cant spot any wear in the parts, then i guess you might just be able to get a die grinder in there and grind a couple of mm's out of the case where the gear has been rubbing.
and then measure the end of the kickstart shaft?
is the bearing ok where the sprocket drive shaft goes through on the secondary side of the gearbox?
otherwise it may just be a case of bad machining, on my spare lifan 125 case i took a pic.
is the hole where the kickstart shaft sits central to the raised boss?
mine is maybe 1.5mm - 2mm forward of centre.
if you cant spot any wear in the parts, then i guess you might just be able to get a die grinder in there and grind a couple of mm's out of the case where the gear has been rubbing.
minibiker
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Alright now im upto the stage of putting it all back together, boght gaskets and all now ive got this problem of the allen key screw hole which has lost the thread just keeps on spinnig the hole has damaged thread it screws on but dosnet tighten now ive already been told to get a tappit thread maker or so but was wonserig is there another solution to fix this, would putting loctite on the screw then screwing it in help and will oil or anythig have problems with the loctite?
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my67xr
Miniriders Legend and Master Spanner Spinning Mode
the Loctite still needs a decent thread to lock into.
maybe check this thread out-
Repairing Stripped Threads
maybe check this thread out-
Repairing Stripped Threads
minibiker
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The hole is really small so not sure they have that kind of size, also do they sell them at bunnings, but not sure if it would work since the allen key screw is attached to the roller you cant seperate it
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my67xr
Miniriders Legend and Master Spanner Spinning Mode
that allen head bolt, that holds the detent arm to the case has a collar/bush on the inside.
the collar/bush is only a light press fit onto the raised flange of the bolt.
i found that if you sit the bolt head in a large i/d washer, put it on something firm (eg; a vise or block of steel) with the allen head facing down into the washer, then give the threaded end a light tap downwards with a hammer, the collar/bush will slip off.
so now the detent arm/bolt is apart.
i've just looked at my spare r/h case.
where that bolt screws into in the r/h case, it has a M6 x 1.0mm pitch thread, the raised boss where the thread is tapped has a 12mm o/d
if you were to tap the case out to M8 x 1.0mm thread, ( a fine thread holds better with more contact area)
then use a countersunk socket headed bolt, and a 10mm i/d washer, to hold the detent arm/roller there, some loctite on the thread will help it stay tight.
the hole through the detent arm is 10mm i/d, the taper of the countersunk bolt will be enough to give it something to pivot on.
there isn't much stress on the point where it pivots, so i'm thinking this repair will last for a long time.
the collar/bush is only a light press fit onto the raised flange of the bolt.
i found that if you sit the bolt head in a large i/d washer, put it on something firm (eg; a vise or block of steel) with the allen head facing down into the washer, then give the threaded end a light tap downwards with a hammer, the collar/bush will slip off.
so now the detent arm/bolt is apart.
i've just looked at my spare r/h case.
where that bolt screws into in the r/h case, it has a M6 x 1.0mm pitch thread, the raised boss where the thread is tapped has a 12mm o/d
if you were to tap the case out to M8 x 1.0mm thread, ( a fine thread holds better with more contact area)
then use a countersunk socket headed bolt, and a 10mm i/d washer, to hold the detent arm/roller there, some loctite on the thread will help it stay tight.
the hole through the detent arm is 10mm i/d, the taper of the countersunk bolt will be enough to give it something to pivot on.
there isn't much stress on the point where it pivots, so i'm thinking this repair will last for a long time.
my67xr
Miniriders Legend and Master Spanner Spinning Mode
did you have any luck fixing the thread?
minibiker
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Unfortunately couldnt 
,i was thinking because i havent got that amount of knowledge and skill and havent done this before was thinking of getting some locktight putting it on the screw then just screwing it in, because the bolt does screw in normally and might maybe get a grip and stay there from the locktight?
,i was thinking because i havent got that amount of knowledge and skill and havent done this before was thinking of getting some locktight putting it on the screw then just screwing it in, because the bolt does screw in normally and might maybe get a grip and stay there from the locktight?
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rotn50
Master Spanner Spinning Moderator
Take the case to someone that specialises in installing helicoils and get them to do, there is quite a bit of tension on this arm and if it comes astray in the case there could be catastrophic damage if it gets meshed in any gears. This will be the cheapest option mate, you can do a dodgy with some hardcore glue or 2 part metal filler but my opinion is this must be done with a new thread be it a larger thread or a helicoil.
