Air cooled 2-Stroke

CvMotoKings
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CvMotoKings
Edited Date/Time 3/1/2016 8:55am
What could I do to add power to my 78 RM250? I know there's problems with overheating when you bore it out, so I wasn't gonna do that. Is the carburetor the only other thing I can upgrade or am I overlooking something besides maybe sprockets?
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Starcrossed
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Starcrossed 2/29/2016 9:45pm
2/29/2016 9:45pm Edited Date/Time 3/1/2016 12:47am
CvMotoKings wrote:
What could I do to add power to my 78 RM250? I know there's problems with overheating when you bore it out, so I wasn't gonna...
What could I do to add power to my 78 RM250? I know there's problems with overheating when you bore it out, so I wasn't gonna do that. Is the carburetor the only other thing I can upgrade or am I overlooking something besides maybe sprockets?
You're all over the place with this RM. You could have posted this question in your other thread...the one where you said the bike had loads of power, but wasn't comfy. A few pics might help improve the responses. This will get you back to the top of the page anyway. Good luck.

http://www.vitalmx.com/forums/Moto-Related,20/1978-Suzuki-RM250-upgrade…

Any idea what happened with Canard in the main Saturday night?
moto455va
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moto455va 2/29/2016 9:49pm
2/29/2016 9:49pm
you could buy an rmz450
Cancerman
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Cancerman 2/29/2016 10:37pm
2/29/2016 10:37pm
You could upgrade to this....

The Shop

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jj welks
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jj welks 3/1/2016 5:59am
3/1/2016 5:59am
Jesus that's a monster of a street bike I thought it was started right at the beginning of the vid... NOPE
CvMotoKings
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CvMotoKings 3/1/2016 7:18am
3/1/2016 7:18am
CvMotoKings wrote:
What could I do to add power to my 78 RM250? I know there's problems with overheating when you bore it out, so I wasn't gonna...
What could I do to add power to my 78 RM250? I know there's problems with overheating when you bore it out, so I wasn't gonna do that. Is the carburetor the only other thing I can upgrade or am I overlooking something besides maybe sprockets?
Starcrossed wrote:
You're all over the place with this RM. You could have posted this question in your other thread...the one where you said the bike had loads...
You're all over the place with this RM. You could have posted this question in your other thread...the one where you said the bike had loads of power, but wasn't comfy. A few pics might help improve the responses. This will get you back to the top of the page anyway. Good luck.

http://www.vitalmx.com/forums/Moto-Related,20/1978-Suzuki-RM250-upgrade…

Any idea what happened with Canard in the main Saturday night?
Yea I don't like changing topic too much and that was for chassis options. This is for power. It's fine as it is, just wondering if I can squeeze anymore out. I really don't want a new bike, I love the vintage look, it's just gonna take me a while to have this one looking great.
Krazyk2774
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Krazyk2774 3/1/2016 7:34am
3/1/2016 7:34am
I have always thought it would be cool to put an air cooled engine in a newer frame for trail riding. Not having to worry about damaging radiators would be nice. How about modifying he rad shrouds on the newer bike to direct nor air down to the cooling fins? Also could you have the cylinder plated to help with heat transfer? Not sure if those old engines had plated cylinders or if that would even work. Newman would be the guy to ask!
Reefer Sutherland 3/1/2016 7:42am
3/1/2016 7:42am
Krazyk2774 wrote:
I have always thought it would be cool to put an air cooled engine in a newer frame for trail riding. Not having to worry about...
I have always thought it would be cool to put an air cooled engine in a newer frame for trail riding. Not having to worry about damaging radiators would be nice. How about modifying he rad shrouds on the newer bike to direct nor air down to the cooling fins? Also could you have the cylinder plated to help with heat transfer? Not sure if those old engines had plated cylinders or if that would even work. Newman would be the guy to ask!
There's one floating around here. It's a 2010ish Honda 250F frame with an 84 CR500 motor. I thought it was pretty cool too. Not something i'd build myself but really neat to look at. Guy did a good job on it too, you can tell he wasn't a ham & egger.
JW381
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JW381 3/1/2016 7:47am
3/1/2016 7:47am
Krazyk2774 wrote:
I have always thought it would be cool to put an air cooled engine in a newer frame for trail riding. Not having to worry about...
I have always thought it would be cool to put an air cooled engine in a newer frame for trail riding. Not having to worry about damaging radiators would be nice. How about modifying he rad shrouds on the newer bike to direct nor air down to the cooling fins? Also could you have the cylinder plated to help with heat transfer? Not sure if those old engines had plated cylinders or if that would even work. Newman would be the guy to ask!
Reefer Sutherland wrote:
There's one floating around here. It's a 2010ish Honda 250F frame with an 84 CR500 motor. I thought it was pretty cool too. Not something i'd...
There's one floating around here. It's a 2010ish Honda 250F frame with an 84 CR500 motor. I thought it was pretty cool too. Not something i'd build myself but really neat to look at. Guy did a good job on it too, you can tell he wasn't a ham & egger.
Dafuq you got against ham n eggs mate?
pete24
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pete24 3/1/2016 8:43am
3/1/2016 8:43am
i just bought this air cooled roach and im going to do a Bradshaw 91 nationals bike out of it, going to take it to rewind then sell it when i realize how shitty it really is

The Rock
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The Rock 3/1/2016 8:47am
3/1/2016 8:47am
Reefer Sutherland wrote:
There's one floating around here. It's a 2010ish Honda 250F frame with an 84 CR500 motor. I thought it was pretty cool too. Not something i'd...
There's one floating around here. It's a 2010ish Honda 250F frame with an 84 CR500 motor. I thought it was pretty cool too. Not something i'd build myself but really neat to look at. Guy did a good job on it too, you can tell he wasn't a ham & egger.
I missed that thread. Do you have a link please? Thank you

Don't know if anyone remembers but I posted before about wanting an air cooled two stroke for 15 to 20 minute MX motos. How light could that thing be?
Krazyk2774
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Krazyk2774 3/1/2016 8:55am
3/1/2016 8:55am
pete24 wrote:
i just bought this air cooled roach and im going to do a Bradshaw 91 nationals bike out of it, going to take it to rewind...
i just bought this air cooled roach and im going to do a Bradshaw 91 nationals bike out of it, going to take it to rewind then sell it when i realize how shitty it really is

I get all nostalgic about the bikes and snowmobiles of my youth. Usually all it takes is a ride on one and I realize why fuel injection and electric start are so awesome! Lol. However I do love seeing old machines restored and part of the past being preserved! My little project is my first bike, a 1981 Honda Z50. I'm going to start with thst one and see how it goes!

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