I am making a US90 hot rod conversion. I have a modded engine in a stock US90. I am not eliminating an early US90 from the world, I had several parts laying around to build a red US90. I want to make a US90 that looks stock but has a few updates. The updates being the forks from a larger trike with suspension and a built motor. What forks can be mounted with little modifications other than the grinding of the tabs. I can get forks from a ATC 250 Big Red but would like to know all my options. I read a post in another area of this site that said all the frames are the same but it was ATC 200s forks on a newer ATC90. Any info would be great.
I believe your trike, mgenest, is the one that gave me the idea to do this. It looks awesome. Will the ATC 250 Big Red forks work, I am looking to mount these forks on my US90, need to know before I buy.
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Arm chair racerFirst time rider
Join Date
Mar 2007
Location
NH
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204
The credit goes to Edog on this bike. I am just the proud owner of the completed project. Ask any questions you may have. If you do put these forks on you will need to put on a stearing stopper.
Trizilla got the perfect forks for your us90. I sold him a set or rutt riders. That would be about the only period correct suspension for the us90. I hope you make sure that the stock frame is in pretty much perfect condition. They have a tendency to break. An aftermarket frame would be a better choice, but it is your trike. Be very careful with that stock frame.
What is the front tire and axle assembly off of? I should have forks soon, 200s. I am going to try and build a bracket to work the the original US90 fender to give it a US90 look with a modern front end.
Check my feedback before buying from meCatch me if you can
Join Date
Jul 2006
Location
United States
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7,765
I would use the complete front fork assy with the correct wheel and hub for that fork as well, I like the thought of a wider front tire on a 90 over the skinny one.
Another question, will the 200x and 250r front axle assembly mount in the 200s forks? I will try and get pictures posted in the next few days of the beginning trike.
Here are the pictures of what I am starting with. As many of you know I built this out of spare parts I had sitting around. The blue fenders that are on it are for riding. I have a newer rear axle coming so I will be able to have more options for rear tires, I am thinking currently PW2. We need to think of a name to give it, GPX 177 is already taken. I will be sure to keep everyone updated as the build goes on. And yes that is a golf cart tire on the front.
Looks good. I'm almost done with my 1973 us90 build. Can you do me a favor? Can you post up close ups of the seat and the mounting in the rear. All I have left is the seat and dropping the motor back in but I'm having problems with the seat. How does it mount in the rear? I know the front mounts with the side plates but I can't figure out how the rear mounts. Thanks.
I believe you are asking how to mount the fender to the frame. The grab bar has a rubber piece on the sides of where it mounts to the frame. The rear fender has two C shaped hooks that will slide over the two rubber pieces. I know it can be hard, it takes me a few tries and I have been used to them for years.
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