T20 heads on a GT250 RAM

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Damian_74
Around the block
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Joined: Tue Nov 06, 2018 5:58 am
Country: Australia
Suzuki 2-Strokes: 1974 GT250L, DR650, Honda CRF1000

T20 heads on a GT250 RAM

Post by Damian_74 »

Looking at going down the Cafe route with my GT250L RAM.

I've got a tank from what I think is a 69 T20 that almost bolts straight in and will look the part with the knee depressions.
What looks out of place is the RAM head.
Has anyone tried fitting T20 heads on a RAM engine?
Mainly concerned with the stud pattern as I can machine the combustion camber etc as required - if someone had one handy and could measure it it would be appreciated!

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jabcb
Moto GP
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Suzuki 2-Strokes: 69 T350 thru 75 GT750
Location: southwestern Pennsylvania

Re: T20 heads on a GT250 RAM

Post by jabcb »

Looks like the GT250L, T350 & T250R/J use the same head gasket. The T20 uses a different head gasket.

For our GT250K cafe build, we used a T250J tank & used stock heads without the ramair covers.
ImageCafe-GT250-0649 by jabcb, on Flickr
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
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Damian_74
Around the block
Posts: 55
Joined: Tue Nov 06, 2018 5:58 am
Country: Australia
Suzuki 2-Strokes: 1974 GT250L, DR650, Honda CRF1000

Re: T20 heads on a GT250 RAM

Post by Damian_74 »

jabcb wrote:Looks like the GT250L, T350 & T250R/J use the same head gasket. The T20 uses a different head gasket.

For our GT250K cafe build, we used a T250J tank & used stock heads without the ramair covers.
ImageCafe-GT250-0649 by jabcb, on Flickr
Hi Jacob, Yes I had a look at all the parts listings - the only common part was the head nuts.
I need some kind person that has a T20 head in front of them to measure the PCD for me!
dollydog
Yeah Man, the Interstate
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Suzuki 2-Strokes: several gt250 ramairs

Re: T20 heads on a GT250 RAM

Post by dollydog »

why bother with all that work to fit t20 heads? the t250 heads bolt straight on with the same sleeve nuts :D i've got the diagonal fin pattern t250 heads on one of my gt250 ramair engines, but the straight fin ones fit just the same. personal choice, but i like the diagonal heads. if you do use t250 heads, don't forget they use short reach plugs, not the long ones that the gt250 uses :up:
cheers, dd.
GTS250 road registered. TS250 engine, Ramair frame.
GT250 big bang road registered. Both pistons fire the same time. USD forks.
GT285 road registered. Overbored - 58mm and TS125 +2 pistons fitted.
GT10 road registered. '65 T10 engine, GT250 frame.
Damian_74
Around the block
Posts: 55
Joined: Tue Nov 06, 2018 5:58 am
Country: Australia
Suzuki 2-Strokes: 1974 GT250L, DR650, Honda CRF1000

Re: T20 heads on a GT250 RAM

Post by Damian_74 »

dollydog wrote:why bother with all that work to fit t20 heads? the t250 heads bolt straight on with the same sleeve nuts :D i've got the diagonal fin pattern t250 heads on one of my gt250 ramair engines, but the straight fin ones fit just the same. personal choice, but i like the diagonal heads. if you do use t250 heads, don't forget they use short reach plugs, not the long ones that the gt250 uses :up:
cheers, dd.
Thanks DD - that was just the info I needed!
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