What actual model is it? - GT250?

General discussion about Street two-stroke Suzuki motorcycles.

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Micron
On the street
Posts: 49
Joined: Thu Aug 03, 2017 1:30 pm
Country: United Kingdom
Suzuki 2-Strokes: GT 250 1975
Location: Essex, England

What actual model is it? - GT250?

Post by Micron »

Hi all, I'm having fun and games trying to get this rebuilt GT250 to start, for which I have started another post for, but I would like to try and workout what actual model of GT250 it is?

It was registered in the U.K. Back in 1975, and is a N Reg, I'm hoping that the pictures below will help to identify the model?

Thanks

Trev

Image

Image
Craig380
Expert racer
Posts: 1250
Joined: Mon Dec 01, 2008 2:52 am
Location: Manchester, UK

Re: What actual model is it? - GT250?

Post by Craig380 »

This site can help: http://www.suzukicycles.org/index.html? ... l~isoraami" onclick="window.open(this.href);return false;

However, from your pics it looks like the bodywork, tank & sidepanels are from a GT250L or M, and the engine is from a later A model. There's no Ramair cowling. If the motor IS from an A, that's good as it was a stronger and more powerful engine (extra transfer ports in the cylinder and two centre main bearings).
1976 GT380 - wounded by me, and sold on
2006 SV650S - killed by a patch of diesel and a kerb in Feb 2019
2017 SV650 AL7 - naked and unashamed
Micron
On the street
Posts: 49
Joined: Thu Aug 03, 2017 1:30 pm
Country: United Kingdom
Suzuki 2-Strokes: GT 250 1975
Location: Essex, England

Re: What actual model is it? - GT250?

Post by Micron »

Thanks for the link, looks like it might be a bitsa! :lol: :lol:
Vintageman
Expert racer
Posts: 1483
Joined: Tue May 18, 2010 5:38 pm
Country: USA
Suzuki 2-Strokes: Suz, Yam, Honda, Kaw.
Location: New Hampshire

Re: What actual model is it? - GT250?

Post by Vintageman »

It looks to be a 1974 L, forks, turns signal, front fender... with engine swap to the next gen A/B/C

Yes a 76 or 77 (in UK 78) Gt250 motor. The biggest diff in how that motor feels vs 74L is the fact they raised the exhaust port from ~32mm to 29.5mm (just like RD350). No bottom end below 4K, but a freaking rocket once revved up. Could never drive mine slow, it would not let you: with rd chambers added 8)

It of course responds well to chambers designed for rd. Suz also made one of the gears a little closer (in ratio to neighbor so would not drop out of power band (that works well even in the T350/Early GT250 too).


The only thing a little better IMO is a T350/T305 top end on the original L engine :wink:

But that 250 as bitted up is existing to drive
Current Bikes
74 GT250 (T350 upgrade),
76 GT250 (T350 upgrade),
71 T350,
70 T350,
74 GT380,
75 T500,
73 GT550,
75 GT750,
72 Yamaha DS7 (R5 upgrade),
77 Yamaha RD400 (Daytona Cyls),
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