CR 80 trike

[BOB MARLIN]

I just aquired a cr80 bike that is a bit rough but is complete and runs. Does anyone know of someone here that has done a cr80 trike conversion ?. This little bike rips, I think it would make a real fun small trike.

[250rmanfmf]

I have heard of guys putting cr80 motors in 200x,250r chassis. I haven't heard of a cr80 conversion. I'd say go for it, what year is the cr80?

[New2Tri-Z]

There are a few on here. I am pretty sure Jason Hall built one for his son. And I reecall another thread but cant find it for the life of me of another CR 80 conversion. I alson recall 86t3 had an RM80 conversion trike. It looked pretty good too. I am pretty sure he sold it as it was for sale in the classifieds.

This thread talks quite a bit about them http://www.3wheelerworld.com/showthread.php/168864-mini-racer-thread-60-and-80cc-pingers-who-knows-what-and-who-has-what?highlight=rm80+trike

[BOB MARLIN]

I haven't looked to see what year it is yet. I know Jason put the 80 engine in a 250r frame but I would kinda like to use the cr80 frame. It would be nice to find some pictures of one that has been done before. I would like to keep the scale of the trike somewhat small.

[tecaterob]

Here's a pic of the RM80 he had in the classifieds. I think he's also building some KX100..
204324

[MIK6]

Here's a pic of the RM80 he had in the classifieds. I think he's also building some KX100..
204324

Justben built the RM80.. ive ridden that thing and its a blast! Brian Ditch has it now..
yes ben is building 2 KX100 trikes..

jonnysX is building a cr80.
Jaoon Halls miniR is a shrunk down 250R chassis w a cr80, its awesome!

lets not forget about my MiniT3!! Kx80 based..

[BOB MARLIN]

That RM 80 is what I'm looking to do. Bigger than an atc 70, but smaller than a 250r.

[rdonald1979]

What swing arm is being used?

[BOB MARLIN]

I don't know what Ben used, but if I decide to do this it would most likely be a custom swinger.

[tecaterob]

I would love to build one but I have too many projects right now. Will build one later..

[MIK6]

Ben modified a 84/85 T3 swinger.. it took a lot of cutting and welding to make it work the way he wanted. .

[Dirtcrasher]

Jason Hall DID build for one for Jacob and it's a BLAST!! to ride.....

I'm over 200lbs and it pulled great, it's FAST.

But a lean teenager could be a deadly threat!!!! on that thing!!

Lots of custom work on Jasons.

[Samjp22]

any progress on this?

[BOB MARLIN]

Only progress made has been the mechanicals to the bike its self. Went through the carb, cleaned the air cleaner, oil change, straitened the sub frame, ect. It's a blast to ride!. I am still trying to decide what direction to go with this. Haven't decided to go with the inverts on the 80 or use the inverts on my 250r. Going through my pile of left over parts to see what axles , carriers and wheels I have that can be used. My main stumbling block is going to be how to deal with the stearing geometry and how the keep the ride hight down if I use the cr80 frame. I am surprised that this doesn't seem to be a common conversion. It sure seems it would make a great little trike.

[Samjp22]

Yeah I am currently also toying with this idea as well! I Know where I can get a cr80 for $250 that needs a top end I think. I have a spare 250r axle, hubs and carrier that I'd like to incorporate. Couldn't you just modify the stock triples or have similar ones made to accept the cr forks and then keep that rake? Or is that too much/little rake and have you come up with any ideas on a swinger?

[BOB MARLIN]

I am a machinist so the triples aren't a problem. There isn't enough material in a stock 250r triple to machine out to make to inverts work. So either way it will have to be a custom triple. I also think the swing arm will have to be a custom made item. I have a china 110 quad that I can use the bearing carrier and axle out of. The rake on a dirt bike frame is way to much for a trike and the overall height is too tall. I know folks do bike conversions all the time, I just got to find out how they solved these problems.

[bushwacker51]

206554206555206553 Here is a few pictures of the 80r I built. Does not have all the custom forks and swing arms on it. But its still cool I think. Good luck in your project.

[yaegerb]

206554206555206553 Here is a few pictures of the 80r I built. Does not have all the custom forks and swing arms on it. But its still cool I think. Good luck in your project.

wow, that turned out really nice.

[BOB MARLIN]

Very nice indeed.

[oscarmayer]

I'm just thinking out lout here. I am thinking that it may be easier to find an old blaster roller, drop in the 80 and convert it to a trike. the reason is the seat will be wider, the stance will be wider and more parts available in-case something happens. I got rid of a yx85 big wheel setup and thought about doing a trike convert on it, but by the time i got a decent seat mounted that would fit, and all that it was a lot more work and tons more cost. So i sold it.

[tecaterob]

206554206555206553 Here is a few pictures of the 80r I built. Does not have all the custom forks and swing arms on it. But its still cool I think. Good luck in your project.

Wow that is really nice.. Great job!!!! Do you a build thread?

[onformula1]

Is this full build on here somewhere?
I can't find it. Very sweet trike!

[bushwacker51]

Thanks for all the nice comments. I never did a full build with pictures. I should have but this project took awhile to build and I never took picture wish I would have. Glenn O.

[tecaterob]

Can you give us some details on the build

[Ol Deuce]

The small 2stroke trikes are tons of fun!!;) Ive been thinking of this my self !!! Go for It Bob!!:Bounce:Bounce:Bounce:Bounce Ol Deuce