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View Full Version : Can a 50 go to a 90?



flht_db
11-29-2006, 09:07 AM
We have an eton 50 and a 70 and both boys are looking for more power. I was going to get a 90 kit for the 70 and a 70 kit for the 50. But, if I can up the 50 to a 90 (not sure if the bottom ends are the same) and swap the motors it might be cheaper. The only thing I think the 70 kit on the 50 is faster than the stock 70.

Other upgrades will be suspension. At least shocks but maybe a-arms and shocks.

Or I just get a TRX 90 and move the little one up to the 70.

mxdad423
11-29-2006, 09:37 AM
no the cases of the 50 and the 70 are not big enough for the crank now somebody told me you could have the cases machined to fit the crank but I never did it so I am not sure but like I said I know stock you can't do it...

flht_db
11-29-2006, 10:18 AM
Thanks, that may limit my options then. Original plan was to move my older son to the 90 and my younger one up to the 70. May have to stick with that. He'd like it.

markvette
11-29-2006, 12:14 PM
the 50 and 70 you have are the same cases, 70 is just a 50 with a 70 kit, neither one can be made a 90 well unless you want to spend a whole lot of money. the cylinder studs on the 50 and 70 are closer together that a 90 cylinder, just buy a used 90 motor, will bolt right in.

Mark

flht_db
11-29-2006, 04:55 PM
Mark,

Thanks for the info. Will have to weigh the options. We do more trails so a 4 stroke might be the way to go. Or I'll be looking for a used motor. Whats a used motor normally run? Any idea?

Thanks-
Dennis

mxdad423
11-29-2006, 05:31 PM
you know if you are just trail riding you may want to just think of doing some engine mods to the 70 the chassis is the same so the size of the quads will be the same weather it is a 70 or a 90. I know this will probably start a war but our built 70's run better than the built 90's I know that sounds wrong but we race every weekend and half of the 90 parents sware that myself and etondaddy are running illegal machines because when our boys on their 70 gate with the 90's our 70's are out pulling the 90's so you could do a few mods to the 70 and probably get what you are looking for just a thought...