Wont pull in 4th

[fatherjackhacket]

I have a gp 200 indian engine with gp gearing and indian box all rebuilt with quality bearings etc, 28 mil dell open mouth running 122-125 main, av264 atomiser x7 needle middle clip, sterling pipe, pulls lovely first 3 gears and will pull oki in 4th when cold, then just doesnt want to know in 4th when its warm...At first i thought the barrel/ piston was at fault, (second hand stage 4 barrel piston) Ive borrowed a mates 225 top end (thats why there is a varying main jet size) and same again, plug colur is ok and it starts and ticks over ok when cold or hot, only think I haven't checked is the timing since it was originally done...Its really starting to get on mi tits now...Any pointers would be gratefully received... :wtf: :bald:

[goldeneye]

is it a genuine GP200 gearbox? some late GP"s. and vijays etc, had the 150 gearbox fitted, and with that sprocket set up (18x47) fourth gear will be dire. seen a couple like this, change of gearbox to GP200 transformed the scooter.

[soosh]

Try 118 main with x13 needle on 2nd clip.
Thats what i run.

[mark]

Sounds like a gp 150 box to me

[Muttley McLadd]

There's an indion box with a ludicrously high fourth. It's called a vijay super mk2 or something similar.
I've got one if someone wants it for the price of postage. An amusing practical joke!?!

[fatherjackhacket]

Many thanks to all for your time and help that gives me alot to go at before I ring the samaritans :shocking: or reach for the biggest hammer i can find :flaming:

[soosh]

Chances are it will be ok,it all turns out good in the end.But yeh,a hammer cetainly helps cos i hate letting a pile of metal get the better of me too.

[fatherjackhacket]

Just whipped the gearbox out and it is a vijay 150 box many thanks for all yours help once again :anbrgin;