ZR 120, ktm 50 motor build.
- Thread starter aksnopro
- Start date
I'd love to see it. I talked to RecMotor about it, and they believe it is not a good idea. I don't remember why. Maybe it was motor positioning...maybe because there is not a class for it in the racing circuit.
It's hard for me to understand how it could not be awesome.
It's hard for me to understand how it could not be awesome.
W
whittaker727
Well-known member
If you have 3 of those motors around for donors, you know they're a nightmare to maintain for performance. I would think that you would have a race only type sled when you were done unless you were willing to be constantly spinning wrenches. How would you convert the kick into a pull start?
That would be great, open the hood and kick the sh1t out of the kids sled and only you would know you were trying to start it!
Sorry
A
aksnopro
Well-known member
Hahaha yes with 3 kids on ktm 50's I know them all too well, our 8 yr old took 1st this year in kenai and 2nd in anch (local rsce series)
But really only reason is i feel like im building my kid a 4 stroke yammy if I put in any other 4 stroke
It would be mainly for racing
And aside from the exhause and intake mods to make it fit I think I could get it done for free!
I would love to use a kx 65 motor but then your getting into gear boxes
Light weight two stroke, syntryfical clutch 420 chain driven just like whats in it and really the only other motor I see working with little effort is a badass chain saw motor?? But $$$$
Sent from my SAMSUNG-SGH-I497 using Tapatalk 2
But really only reason is i feel like im building my kid a 4 stroke yammy if I put in any other 4 stroke
It would be mainly for racing
And aside from the exhause and intake mods to make it fit I think I could get it done for free!
I would love to use a kx 65 motor but then your getting into gear boxes
Light weight two stroke, syntryfical clutch 420 chain driven just like whats in it and really the only other motor I see working with little effort is a badass chain saw motor?? But $$$$
Sent from my SAMSUNG-SGH-I497 using Tapatalk 2
J
josh@andeon
Well-known member
Yes the KTM motor works in the 120 and it rips. The hardest part is getting the shim stacks in the clutch right because it's not like a Dirt bike tire. Doesn't spin as easy. We robbed the motor out of My sons Pro Jr and was tons of fun for him. But he destroys everything he touchs. And it's hard to find a class for him to race in with this set up as well. But it's a blast at radar runs when they do 40mph on a z 120. Also seen a 088 stihl motor in one as well. Had a jackshaft with stock clutch on it and chain between saw a jackshaft. That thing was insane but had 1500 in just the saw. Also Jetting is a pain seems every 5* you have to change jetsHahaha yes with 3 kids on ktm 50's I know them all too well, our 8 yr old took 1st this year in kenai and 2nd in anch (local rsce series)
But really only reason is i feel like im building my kid a 4 stroke yammy if I put in any other 4 stroke
It would be mainly for racing
And aside from the exhause and intake mods to make it fit I think I could get it done for free!
I would love to use a kx 65 motor but then your getting into gear boxes
Light weight two stroke, syntryfical clutch 420 chain driven just like whats in it and really the only other motor I see working with little effort is a badass chain saw motor?? But $$$$
Sent from my SAMSUNG-SGH-I497 using Tapatalk 2
Last edited:
hi,im new here and was reading this thread.I was going through some old sled stuff in the shed today and came across a 250 spirit f/a engine.that thing is really small.this would be a pretty nice engine for the kids 120 if there was a way to set for a tapered crank,
W
whittaker727
Well-known member
About 3.3 stock.
