how much work would this be?

[blasterboy32]

86-89 honda trx 250 R motor
How much work would it be to put that into a blaster frame? Has anyone done it? I know I would have to get a radiator mounted somewhere since its liquid cooled. Is the rear mount on those motors the same as a blaster where it is mounted with the swingarm bolt?

 

[Surfrjag]

if you can fabricate.. anythings possible

 

[wwholden]

Yup ^^^^^ if you have a welder, grinder, bandsaw, and some scrap metal it can be done.

 

[blasterboy32]

Ya I can fabricate and have the tools but I just want to know how much fabrication it will be and is it worth it?

 

[mjgnslngr]

sh*t, for 650, id look for a yz250. that be more of an appropriate swap. yamaha to yamaha...lol

 

[Brute71]

Youd have a counterbalanced 250 2 stroke that would generate more reliable power than a worked blaster engine (and just more power). So in my eyes it would be worth it, and would be much smoother than a regular 250 swap.

 

[Blaner]

work wise its hard to say, its always more than you bargain for and each project has its hidden surprises

 

[blasterboy32]

I'm going to look for a different 250r motor maybe ones that comes with exhaust and Carb atleast because 650 does seem like a lot for a bare motor

 

[toytech]

look for a yz motor. those honda motors kick forward, hard on your knee.

 

[dksix]

The TRX250R engines didn't make great power stock, about 33 is what I've read. Down from the reported 38 of the 85/86 ATC250R. For the $650 to buy the engine, the $300+ you're going to have to spend on a pipe, carb, intake, reeds, electrical and a harness, you be ready to start the hours and hours of work and be spending more in the rights to do the mods. You'll likely be at $1500 plus the cost of the roller and 50 hours of mod time, you'll have a 250R powered Blaster making 33-35 HP. Or 240cc Big Bore Blaster Complete Package......$929.00

Kit includes: Re-sleeving your cylinder with a big bore sleeve, CT porting, head re-chambering, modified big bore piston kit, Keihin 35mm PWK pre-jetted carburetor, air box adapter tube, throttle cable, TDR reeds, CT Sonic pipe and silencer, top-end gasket set, and installation labor. This kit is for the stock Blaster cylinder. This kit price is for you shipping us your cylinder and head. That is capable of number more like this:

 

[Triplecrown421]

wow i didnt know the trx's were that low in power they must have great torque numbers thoo. hell if you wanna make 30+hp all you really need is head work and port timeing to make them numbers out of a stock blaster motor. no need for expensive bbks or big carbs

 

[dksix]

Re: how much work would this be

wow i didnt know the trx's were that low in power they must have great torque numbers thoo. hell if you wanna make 30+hp all you really need is head work and port timeing to make them numbers out of a stock blaster motor. no need for expensive bbks or big carbs

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That's what I've read the numbers to be. I've always thought it sounded low too. Maybe someone has charts or something on those engines with better information.

 

[best]

My take on it is any swap will be a lot of time getting the bugs out.
You know, the crazy little things like strange vibrations, parts that crack, parts that rub, right sized radiator, good air filter set up, proper gearing, etc.

What advantage does a TRX250R motor in a Blaster have over a TRX250R?
You are missing the wheelbase, shocks, suspension, width, ergonomics, brakes and cache (which is worth about $3500 around here).