I stumbled across someone (while searching google) on this forum doing a Blaster Crank Swap on a DT engine, and I've also heard from time to time that a few people have performed a Big Bore conversion on the DT125/DT175 engine that the 200 is based on (which makes sense, they share the same cylinder jug bolt pattern)
I have an early production '78 DT125E Motorcycle that I did the MX175 Top End Swap to years ago, as well as a full rebuild and custom colorshift paint job. It was my first motorcycle and I've had it for years. I have no intentions of getting rid of her to get a larger bike (I've got larger bikes, but I love the lightweight DT), yet I'm always searching for more power.
Does anyone know what all is involved in fitting a Blaster Stroker Crank in the DT125/175 Case? I would imagine some clearance work is needed, due to the longer stroke? I'm no stranger to that, having built a few stroker V8's for my cars. Are the bearings themselves the same size? Require different bearings?
I know I could fit a Big Bore Top End to her, with a Vito's Spacer to make up the difference in stroke between the Blaster and DT, but that would only net me about a 200cc engine. If I've got her torn down, I might as well aim for a 230-240cc build, meaning I'll need that longer stroke crank too. EDIT I actually have that backwards, the Big Bore Cylinder would have to be shaved/milled to take some off to make up the difference in stroke between the Blaster & DT Cranks if I kept the stock DT Crank
Seems like the perfect time to take on a project like this, with winter here I'm definitely not riding the lil DT to work any time soon. Before I go ordering any parts though, It'd be nice to hear from some folks who have done this before.
I have an early production '78 DT125E Motorcycle that I did the MX175 Top End Swap to years ago, as well as a full rebuild and custom colorshift paint job. It was my first motorcycle and I've had it for years. I have no intentions of getting rid of her to get a larger bike (I've got larger bikes, but I love the lightweight DT), yet I'm always searching for more power.
Does anyone know what all is involved in fitting a Blaster Stroker Crank in the DT125/175 Case? I would imagine some clearance work is needed, due to the longer stroke? I'm no stranger to that, having built a few stroker V8's for my cars. Are the bearings themselves the same size? Require different bearings?
I know I could fit a Big Bore Top End to her, with a Vito's Spacer to make up the difference in stroke between the Blaster and DT, but that would only net me about a 200cc engine. If I've got her torn down, I might as well aim for a 230-240cc build, meaning I'll need that longer stroke crank too. EDIT I actually have that backwards, the Big Bore Cylinder would have to be shaved/milled to take some off to make up the difference in stroke between the Blaster & DT Cranks if I kept the stock DT Crank
Seems like the perfect time to take on a project like this, with winter here I'm definitely not riding the lil DT to work any time soon. Before I go ordering any parts though, It'd be nice to hear from some folks who have done this before.
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