1973 Suzuki GT750K, Fuel Injected, GSXR suspension

Retro, Wild, Cafe, etc. The stuff only your imagination can come up with.

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Knut
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Suzuki 2-Strokes: GT550, GT750, T500, T250, T350, H1, RS

Re: 1973 Suzuki GT750K, Fuel Injected, GSXR suspension

Post by Knut »

JoostGT wrote: As for exhaust, I'm still undecided whether I should go the easy way and buy/mod those J&R pipes or if I should "fix" my stock pipes till I have time and motivation to make my own set. I really like these exhausts, they're tucked up nice, short and fat, just don't like the mufflers or their position.
Those pipes on the GTR are modded sled pipes, Polaris I think. They are re-angled and the expansion is narroved a bit.
JoostGT
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Suzuki 2-Strokes: GT750 GSX750ES

Re: 1973 Suzuki GT750K, Fuel Injected, GSXR suspension

Post by JoostGT »

Suzukidave wrote:Did you decide which way you are going with your chambers ?
I decided not to buy to JR pipes since they were too expensive. For that kind of money I can make my own which would fit the bike a whole lot better.

I tried to optimize the exhaust using my software, but I can't get it to run on my new laptop and the support from the creator is terrible :roll: so at a moment I'm a bit at a standstill.

Also the guy I was hoping who would do my crank had a hartattack :shock: He survived and is doing well, but is taking it slow, so that means even more delays for me. Of course his health goes first, but my crank is a very close second ;)
JoostGT
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Suzuki 2-Strokes: GT750 GSX750ES

Re: 1973 Suzuki GT750K, Fuel Injected, GSXR suspension

Post by JoostGT »

So, this has been a while...

As you might understand, the GT has been running for a while now and I've even got the FI working like a treat! I could write pages about what I've done, what worked and what didn't, but I won't, not because I don't want to share, but it's just too much :lol: These pictures are as it stands now:

Image
Image

I've actually had it on the dyno recently as well:

(sorry no chart yet!)

Which is a proper result if you ask me! It's a bone stock engine with a thick HG so there's lots left to gain, but for now I'm just enjoying it 8) The green line is as it came in, the red line as it went out. The drop in power up top is due to fuel residue in the system, the runs were very short. The other lines are 50% and 30% throttle, just a check.

edit: photobucket seems to be broken or something, I cannot upload the dyno chart... But it's 54hp at the wheel :)
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oldjapanesebikes
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Re: 1973 Suzuki GT750K, Fuel Injected, GSXR suspension

Post by oldjapanesebikes »

Nicely done Joost ! :up:
Ian

If at first you don't succeed, just get a bigger hammer !
Suspensionking
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Re: 1973 Suzuki GT750K, Fuel Injected, GSXR suspension

Post by Suspensionking »

Wow that is a lot of work and determination I congratulate you and welcome to a great forum

Eamonn
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