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Tortrons GN


tortron

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Sinnis Apache 125 has a china clone of the gn125 engine

available in fuel injected for the last few years. Might try import some parts for that

They also seem to do 0-100 in 17 seconds standard? must be a gearing thing i dont think my gn is any slower than normal

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10 hours ago, tortron said:

They also seem to do 0-100 in 17 seconds standard? must be a gearing thing i dont think my gn is any slower than normal

I think you'll find it's a lying thing.  My last Chinese clone Honda motor was supposed to be 50cc but was a sneaky 70

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oh boy it soft seized 

 

I dunno what happened there, But it lasted the same number of km as that last set of rings that shat them selves.

Theres no printed minimum ring gap for a gn125 or dr125, so i used the DR200 specs. and went 0.12mm. (0.1 to 0.2mm min, 0.5mm max)  Maybe i need to use 0.2?

fuel mix looked happy to me. around 12.5 at wot, as lean as 14 on cruise.

i dunno, any ideas what im doing wrong here, or is it just shit bike syndrome

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pistons.JPG.98c77d2582783a06fa95cf7f57a79a54.JPG

Piston pin looks as new so i dont think it had an issue with oiling or not being oiled when i put it in

plenty of oil up around the cam, so i dont think theres a problem with oiling

 

 

or am i way off and its just running hot due to timing (tho it is running on 95 and has 2 base gaskets)

 

 

 

 

piston expanding funny or too big?

 i didnt check it, other than the piston fitting and moving.

 

I guess thats my fault for assuming enough tolerances on new piston and a bore i have honed a couple of times

 

 

 

 

 

i dunno what to do next tbh

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Is it a Chinese piston? 

Last big bore scoot engine I did with china parts , the piston was too tight in places and I had to creatively "machine" some extra clearance 

It then survived a trip around the east Cape at wot for 3 days so it must have been good  

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