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Post by cromwelluk on Apr 28, 2020 16:02:28 GMT
Yes it took a bit of finding in the end, the bowl covers had a machined boss " Breather hole " near the top and kept leaking petrol changed the covers and still the same also checked the float height and float needle valve and they were ok, after much messing about got it to a slight leak when full the pump occasionally ticked pumping more fuel into the carbs so once again got the carbs stripped on the bench and pressurised the fuel line ( blowing down the fuel pipe ) which lifts the float but when I held down all the floats air was leaking, found it to be passed the float needle brass seat O ring, popped all 4 out and fitted new O rings and job done Now need to double-check the float height and looks to be sorted Never had this before must have perished when stored
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Post by Graham on Apr 28, 2020 22:14:58 GMT
I had no end of problems with my 750 carbs flooding, leaking etc. Spent a fair amount on seals, gaskets getting them right then fitted a genesis 1000 engine!
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Post by fzjamie on May 3, 2020 8:42:45 GMT
Thanks for teh update. If ever I get an overflow on Mikuni CVs now I check those pesky o-rings. Had the same problem with my XJ and then on the FZ. I think they must be an imperial size as I can a get an almost fit size in metric that work but you can tell they are not 100% correct.
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Post by cromwelluk on May 21, 2020 19:34:12 GMT
Evening Carbs are leaking again one float was set a little high " its a funny old Game " set them by measuring the float height looking for the definitive height to set them using the fuel level I seem to recall 11mm under the line on the bowl back Can anybody confirm Also made some simple tubes to actually see the levels this time For some reason, my Carbtune (needle in tube type ) were all over the place, tried different pipe/tubing and restrictors just ordered some dial gauges to balance the carbs and they work a treat more accurate and the adjustable valve makes them a lot easier to use Recommended
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Post by fzjamie on May 22, 2020 11:23:59 GMT
As luck would have it I have my Clymer to hand. Says. 8.3mm +/- 1mm. No sure how you resolve down to the 0.3mm though!
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Post by Graham on May 22, 2020 13:02:23 GMT
Think I set my floats to 10mm. To balance all my carbs I use a clear plastic tube wound with a few loops in it. Ball bearing in the loops. One static as a reference, the other has to sit level with static one. Each end of the hose is connected to a carb. Works like a charm and cost me less than a tenner around 5-6 years ago!
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