vm26 on yx160 jetting

[spoonta68]

hey peoples
just scored a genuine vm26 running the following jets
main:190
pilot:22.5

ill be installing it on a gpx yx160 out of a pitsterpro

only mods on engine are inner rotor kit and big bore exhaust

what do people suggest for a good jetting?
never buggered around with jetting before

regards

 

[my67xr]

what is it off? the Main jetting sounds like an 80cc-100cc 2 stroke ?
if it was off a 2 T, then you'll need to modify the carby to work properly on a 4 stroke

the Pilot jetting could be close ?

do you have a lightened slinger?
i've heard the inner rotor kits can break crankshafts when running a stock slinger

 

[my67xr]

maybe post up the serial number off the side, i'll see what details i can give you

 

[my67xr]

just looked at VM26 specs, 190 main in both VM26 carbys, the 2 stroke (8074) takes a 60 Pilot jet though
i reckon it is a 4 stroke carb (606)

main jetting, i would try a #110 for starters.

then i would buy #105, #115, #120, #125 jets for tuning

possibly a #25 Pilot jet too ?

 

[spoonta68]

cheers mate for all the info
yes engines got a lightened slinger but have ran them with out fault on a few other yx 150 and 60 engines without l/slinger

its a vm26-606 and its definetly a 4 stroke carb
got it from a supplier as surplus its identical to this except i didnt get spare jets
http://classichonda50saustralia.com.au/store/index.php?_a=viewProd&productId=28