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PostPosted: Sat Aug 16, 2014 11:50 pm 
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Still in the Driveway

Joined: Sat Aug 16, 2014 11:25 pm
Posts: 2
Country: USA
Suzuki 2-Strokes: 1973 gt250
I'm new here and new to racing as well as these early Suzuki 2-stroke. My Dad and I have been wanting to start racing for a while. We both love vintage racing so that is what we have decided to do. We were originally looking for a cb350k or something like that but we both really wanted a 2 stroke.

Then we were given a 1973 gt250 for free!! The bike is in great shape minus the motor.

So we are in the middle of a complete rebuild including rods from a gt250a and pistons from the same model. We are going to convert the bottom end to take 62mm bearings instead of the extremely rare 65mm bearings.

I was curious if there is anybody is racing one of these in the states? If you do or have I would love to ask some questions.


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PostPosted: Sat Oct 18, 2014 5:56 pm 
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On the street

Joined: Sun Sep 26, 2010 9:34 am
Posts: 21
Location: Northwest Ohio
Welcome to the site and welcome to the wonderful world of roadracing. You'll probably find that there are few things more expensive than a free motorcycle but please don't let that stop you. There is a lot of information on this site and many knowledgeable people who can answer any questions you might have. I hope to see you at the track. Tim

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Worrying is simply praying for something you don't want.


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PostPosted: Sun Oct 19, 2014 10:11 pm 
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Still in the Driveway

Joined: Sat Aug 16, 2014 11:25 pm
Posts: 2
Country: USA
Suzuki 2-Strokes: 1973 gt250
I am really looking forward to it. I'm very aware of the expenses. I have background in 4 wheeled racing. 4 wheeled racing is crazy expensive since A good set of tires for a car cost more then a cheap race bike cost.

I've been doing some research on the old tr250 motor specs and things like that. I'm just having hard time finding info on suspension setup. But I'm not to worried about it. I'm just going to set it up the best I can with basic components and upgrade as I go. That way I can learn what I'm actually changing instead of going off what somebody else says.

I will admit I know nothing about setting up proper suspension on a motorcycle. I know how to make a car handle good but not a motorcycle. So the learning begins!


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PostPosted: Fri Oct 24, 2014 8:27 am 
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On the street

Joined: Sun Sep 26, 2010 9:34 am
Posts: 21
Location: Northwest Ohio
You can also join "North American two strokes" . The administrator there, TeeZed, used to race a T250 I believe.

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Worrying is simply praying for something you don't want.


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PostPosted: Fri Dec 18, 2015 2:14 pm 
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Still in the Driveway
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Joined: Thu Dec 17, 2015 10:33 am
Posts: 2
Country: Canada
Suzuki 2-Strokes: T20, T250, GT250, T350
I have been racing a 76 GT250 for the past two years here in Canada and the bike is reasonably competitive only my skills are holding it back. I have done a lot of tuning to both T250's and 76on GT250's and have learned a lot, the earlier GT's relate to the T20's and T250's where the GT after 76 is a different kettle of fish. I have three sets of cylinders with different specs ready for this coming race season so I will know more then. But if there is anything I can help with just ask.


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PostPosted: Fri Dec 18, 2015 4:56 pm 
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Expert racer

Joined: Tue Dec 16, 2008 11:37 am
Posts: 1021
Location: Trowbridge UK
Country: UK
Suzuki 2-Strokes: T500R, SV1000S, TS125, Seeley T500
Hi,

The UK Classic Racing Motorcycle Club run a class for 250cc Air Cooled bikes. There are a few X7 raced to good effect, I don't know how that engine compares to the GT250 but there must be a lot similarities. Tuning would be much the same for both I suspect. There is a Classic Motorcycle Racing Forum, see link. I'm sure you can gather some good advice if you ask a few questions.

http://www.cmrf.co.uk/smf/index.php

Cheers Geoff


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PostPosted: Sat Dec 19, 2015 7:28 am 
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Still in the Driveway
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Joined: Thu Dec 17, 2015 10:33 am
Posts: 2
Country: Canada
Suzuki 2-Strokes: T20, T250, GT250, T350
Thanks for the link I will check it out. As far as the X7 goes I think the difference is it runs reed valves and an electronic ignition std where as the rest of the GT's are piston port. The only issue I have right now is getting the beast to rev higher but I am hoping a switch to 32mm carbs for next year will rectify that.


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