150 motor in a trx90?

[fergy]

anybody ever put a 150 dirt bike motor in a trx90? Just looking for more power and a clutch. Anything thats cheaper than buying a new raptor 250. The boys wanting to keep up with his buddies 250 raptor. Any ideas?

[lkrislong]

im in the process of doing it now should have it finished in the next few weeks ill post pics and tell you if i run into any trouble if you like but to be honest buying a 250 would be cheaper if you dont mind the extra weight

[jb617]

how is the build going ? what is a easier build putting a 150 or a ktm 85 in 09 trx 90 any help would be great. also what radiator do you use,

[lkrislong]

the 2 stroke would be easier but everyone runs the 85. we are using the radiator off my yfz450 just because our fabricator needed it now. had to cut the middle bars on the frame to make room for the radiator think that was the only trouble spot. ill post some pics when we get it back should be this week

[jb617]

that would be great im starting my build next week motor will be a ktm 105 mod with a rekluse clutch hope my son love it.

[lkrislong]

are you going to race that you might want to check the rules if you are. we are only aloud to run up to 85cc 2stroke or up to 150cc 4stroke but im sure if your not winning every race they wont even worry about it

[jb617]

were we live in ca there is no quad racing around us only mx we ride quad at sand dunes

[lkrislong]

hybrid

[jb617]

looks good. i just tore mine down for the 105 what radiator are you going to run. im not sure what to use yet. was the fit pretty tight or everything go pretty good.

[lkrislong]

was very tight i thought it would be an easy swap
had to almost rework the entire frame
we are using the radiator off the crf150r ill post a pic of them monday

[lkrislong]

used the split ones like on the dirt bike

[lkrislong]

but they work great even used the roost gards

[05/450r/10]

finally some one did this i am thinking about doing the same thing did you have anyproblems

[lkrislong]

yeah a lot but my fab guy that did the work on the frame is badass he builds race cars. we got lucky it came out perfect just got the gearing right and with my daughter on it it runs with my tricked 450