Reinhoud

Again, not sure about the diameter! The plenum is 2.5 liter, twice the size of the displacement. Plenum isn't that great, mostly the connection to the carburetors.

Not sure, 14mm outside diameter IIRC

Uuuuhhh Fixed it..

I crashed my bike about 5 months ago (P-plater doing a turn out of the blue), now I'm rebuilding it, and (try to) make some improvements along the way... I'm going to make a new plenum with (sort of) velocity stacks, the up pipe is also something where there's something to improve. My bike was running fine! The up-pipe doesn't look that great, and the inside looks even worse, so I thought may be I can improve that.. The pitot tubes I have in my up-pipe come from a sub-frame from a FZR250, this had a good diameter and a fairly tight bend in the pipe. The plan is to make a new up-pipe and have it TIG welded by someone who knows what he's doing, but the pitot tubes are the challenge, and this is not something I'd like to experiment with... No 1; is how I have it at the moment. My question; does it matter what shape the pitot tubes have? I don't want to use the old ones because they look like crap. I'm not able to get a "sharp" bend in the tubes as what I have now, I can make the tubes at the right size, a / the sharp-ish bend is the problem. So I've got 2 options; a 90 degree angle in the tube, like no 2 in the drawing, or a straight pipe into the uppipe with a 45 degree agle on the bottom as in drawing no 3. Anyone who knows more about these things? Thanks.

That's not a bad idea..

First get a proper gauge.

Did you check the fuel pressure? I had to shorten the spring in mine, 1.5 / 2 psi is what you want. If you have everything right it should be pretty close to stock, if the bike ran alright before turbo'ing it, it should run ok with a turbo. Don't guess, meassure!!

Ported / gasflowed defenitly makes a difference! At least, that's my experience.. My gasflowed head gives a way more agressive throttle response, over a ported head.

Ah, thanks.

I can... What are the tolerances? What material?

If you get desperate, I have a 16mm master cylinder from a GS1000, live in OZ

https://www.Eblag.com.au/itm/255989213826?epid=649335435&hash=item3b9a256a82:g:xi0AAMXQjwVQ9csE&amdata=enc%3AAQAIAAAA8Nn0%2F9z6%2BmTi%2FS7BC0oWpc5E36UhrRcSthz6lH47mfjN6WpMp6EF%2BWlEc0BEwhRhvkecJM%2BKk2mE4FYY5eH%2Faa5p1qVjsmqgLrLZK9Rr5dIUh7aOOHL7va9hJpvfN1G13pLMypZ7pLvD2VFzcp0RD8P%2Fw42hymwMkmgRJPdvZepDlF1A62y%2B97TNhMY1RBFXGSve5ESVdSdMelQK76CaNvoxzab%2BzjouMTtjJdpl6BuwWuTQRDD5PllAVFUoM6Gf1U3w6GBveZnAeAU9Q7rrPSIzf%2FUj%2BHoUc3N%2ByNak8MfmXAK9zDzRkJS%2BJida5WQi7A%3D%3D|tkp%3ABFBMvLfzk89i

I've got a Bandit swingarm too. Is yours also a 1000?? Just had to make bushes into the existing bushes.

If you want a smoother idle you need copper core plugs..

Photo?

Think so. What's the problem?

I've got 1mm more lift in my GS1000. My experience is, use the stock timing, everything else creates a poorer / sluggish throttle respomse, and on boost there's no / hardly any difference. What I also know from experience; Say, the GS1000 with "hot" (284 dgrees IIRC) cams won't work on a stock CR, it makes it actually slower/sluggish. How this works with a turbo I have no idea, but probably not well. So, probably best, keep it stock, or close to.

Connect an O2 sensor with gauge, and this tells you if the carburfuckingettors are tuned properly

https://www.Eblag.com.au/itm/173922722900?hash=item287e9a2454:g:1f8AAOSw6Otixo8e&amdata=enc%3AAQAIAAAA4Bfv6DwIQu%2BigyFZUwMOhbnNT3MALh9XChsQi6D3yAm0M6FDPpOKTiIYSqMayihEZ114e6j57YTWt6ZRt3zsski2oBYRh18E42na6z1muV5DlwzYiAD3Vk4aMGgupkHC3Y2ARSkt0Jzocv4fIHeE9zdug5QFK28Wnc3VWSX8hdEk3v0UkbVBt6%2B1tGTerot86%2FkNK1E%2Bwcph%2BTw98tOMgqWwXQ4JOAETXMNNQR3hQ1PnH865Hqr6uWLmOmgUlD5FCM2K%2BITdfQYqsqyAzXkj1iPR6l6A6xH%2F1qCVEuUb5idl|tkp%3ABFBMvMi8nsJi

My GS needed 2 x the displacement, I had to redo my plenum twice. It just didn't want to run properly, with the first one it hardly wanted to run at all..

I think I have a whole master cylinder, you can have it for the cost of postage. if you break it

Isn't your plenum too small?

Thanks for your explaination! I'm about to make a new plenum, see if I can think of something. The reed valves is easy, but the air filter is going to be a challenge.

I'm going to make some myself, the tubes on the plenum to the carbs are a bit smaller. Now I can make it with the exact dimensions as the carburetors. I ordered something to cut a radius with.

I need steel, and they need to be short. I already have an idea and ordered a cutter to make a radius..