521 jetting starting point

[Ktm250r]

Just bought this banshee with a new 521 kit installed, was told it only has about 30 min run time on it, he had fmf pipes on it for the break in, I took off the pipes to mount cpi big bore in frame but noticed lots of oil residue in the fmf, I'm guessing he had pretty rich for break in, mods are 521 cheetah kit, v force 4 reeds, 38 or 39 pwk carbs with k&n pod filters, cpi in frame big bore exhaust, dynatek coil, c12 @ 40:1 castor 927, I'm at 3575 feet, haven't checked the jetting yet, just wondering if anyone with the same setup could help me with a starting point for jetting?

Thanks in adavance

[sleeper06]

Good starting point would be a 175 main ,55 pilot,4th clip on needle.

[Ktm250r]

Good starting point would be a 175 main ,55 pilot,4th clip on needle.

Thanks for the reply, Just checked it and has 170, 55, ddj 3rd clip, #7 slide

[PaymentPlan]

Just bought this banshee with a new 521 kit installed, was told it only has about 30 min run time on it, he had fmf pipes on it for the break in, I took off the pipes to mount cpi big bore in frame but noticed lots of oil residue in the fmf, I'm guessing he had pretty rich for break in, mods are 521 cheetah kit, v force 4 reeds, 38 or 39 pwk carbs with k&n pod filters, cpi in frame big bore exhaust, dynatek coil, c12 @ 40:1 castor 927, I'm at 3575 feet, haven't checked the jetting yet, just wondering if anyone with the same setup could help me with a starting point for jetting?

Thanks in adavance

Cheetah cub Or just cheetah?

[Ktm250r]

Super cub? It's the $2,999 kit from bp racing, they list it as super cub, I have no idea what the dome size is or what porting it has :s what pipe should I run on it? I have a new set of cpi raw big bores but not to happy with the fitment, left side hits the head and pod filter on the stator side no matter how I shim them :s I've read that shearer small bore fit good? But can they be run on this size engine?

[PaymentPlan]

Super cub? It's the $2,999 kit from bp racing, they list it as super cub, I have no idea what the dome size is or what porting it has :s what pipe should I run on it? I have a new set of cpi raw big bores but not to happy with the fitment, left side hits the head and pod filter on the stator side no matter how I shim them :s I've read that shearer small bore fit good? But can they be run on this size engine?

521 you want BB pipes. Look into some snipers.

[PaymentPlan]

It will be a super cub engine. They don't make 521 cheetahs, just a lil info.

[m671054]

Just fyi, they did back in the day. Now they are all 535 but some ealier ones were slightly smaller bores. To the op that needle sounds odd. Im not positive but i think cel or cgl is more normal.

[Ktm250r]

Thank guys

[PaymentPlan]

Just fyi, they did back in the day. Now they are all 535 but some ealier ones were slightly smaller bores. To the op that needle sounds odd. Im not positive but i think cel or cgl is more normal.

You might be right, but I still have yet to see one.