Carb Tune

Wayne1960 · #31 PostAuthor: **Wayne1960** » Tue Aug 25, 2015 11:20 pm

z1 great observation but the end had broken off so i simply moved the black tab down.
Steve didn't set the carbs up.
compression is ok

Wayne1960 · #32 PostAuthor: **Wayne1960** » Tue Aug 25, 2015 11:22 pm

when i first put the carbtune on i actually got it to balance at 20 on the scale then fussed and messed it up. im just trying to re sync before i start again.

z1bman · #33 PostAuthor: **z1bman** » Tue Aug 25, 2015 11:25 pm

your wiring harness is routed in the wrong place it should go between the top of the airbox & the top frame cross member

z1bman · #34 PostAuthor: **z1bman** » Tue Aug 25, 2015 11:27 pm

take a photo of the slide from the opposite side of the carbs

Wayne1960 · #35 PostAuthor: **Wayne1960** » Tue Aug 25, 2015 11:38 pm

Z1 do you have a pic showing the description of the wiring harness please?

z1bman · #36 PostAuthor: **z1bman** » Wed Aug 26, 2015 9:56 am

the harness goes on the inside of the frame between the air box then through the side of the air box bracket at the top of the frame tube

Wayne1960 · #37 PostAuthor: **Wayne1960** » Wed Aug 26, 2015 10:04 am

Thanks that will be changed!

kev edwards · #38 PostAuthor: **kev edwards** » Wed Aug 26, 2015 2:37 pm

Hi Wayne, looked at your pics, your carbs look like 28mm to me I had a set on my old A2, as you don't have the airbox rubbers on it would be easy to remove the carbs and reset the slides, the adjustment screws look quite low down in the nuts, it also does not mater whether its 20hg or 25hg on the gauges as long as they are about the same, are you far from me? i'm at Walderslade.

z1bman · #39 PostAuthor: **z1bman** » Wed Aug 26, 2015 2:42 pm

78/79/suzuki gs750 slides do not have the notch in the slide like the kawasaki one does

http://www.ebay.co.uk/itm/77-79-SUZUKI- ... 462c255d0b

Wayne1960 · #40 PostAuthor: **Wayne1960** » Wed Aug 26, 2015 3:19 pm

hi Kev i'm in Hempstead, what bike do you have?

I did check all measurements of the carb when i stripped them down so was fairly sure they were spec carbs as most of the bike.

Z1 i agree and this is very strange.

Kev im desperately trying to learn and can pick up most things. you are correct the adjusters do look low down but much the same as they were before i stripped the carbs.

Wayne1960 · #41 PostAuthor: **Wayne1960** » Wed Aug 26, 2015 9:11 pm

z1bman

Harness re routed and looks so much better and will now clear the petrol tap!
thanks for spotting that.
Ive set the throttle slides as best i can, they are all sitting the same and 0.5mm gap thickness of a paper clip.
just have to rely on the carbtune now i guess.

z1bman · #42 PostAuthor: **z1bman** » Wed Aug 26, 2015 10:04 pm

how low was the compression down on no 2 compared to the other cylinders?

Wayne1960 · #43 PostAuthor: **Wayne1960** » Thu Aug 27, 2015 6:34 am

Think all were at 8/9 and number 2 at just above 7
I think it's the inlet shim. All shim readings are around 0.0025 to 0.0035 but this shim is very tight a little less than 0.002 and needs changing I think.

000zeds · #44 PostAuthor: **000zeds** » Thu Aug 27, 2015 6:44 am

Wayne that is nearly no clearance at all and when the engine heats up to working temperature it will close , I think you should get that sorted first !

Wayne1960 · #45 PostAuthor: **Wayne1960** » Thu Aug 27, 2015 6:54 am

On my list for the long weekend. Just hoping my neighbours going away! It was about 0.005!
I used the chart in the manual and now it's tight, I'll check it again.
So I'm guessing perfect would be around 0.003

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