SOHC.co.uk Forums > CB500/550

Running on three

<< < (9/10) > >>

Sesman:
To be fair mezzanine, we have been through this multiple times. I have internal photos of both genuine and pattern jets. It’s an interesting kaleidoscope effect caused by the internal drilling reduction. TBH, there is no Techncial/practical reason for anything other than a stepped drilling reduction to create effective atomisation under a partial vacuum.

JezzaPeach:
I agree, a carburettor specialist has said the same. Interesting that the internal drilling helps too.

gary123:
Ok, I have to agree it is an optical illusion. If you look down the tube while rotating it the "web" does not rotate. For me, at least, that draws a line under spidergate.

However, after following all the advice offered my bike now runs, revs and ticks over nicely on all four cylinders. Probably a bit of dirt in the jet. Thanks to all who contributed.  :)

JezzaPeach:
Excellent news 👍 I think I cleared a minor blockage once by using full choke and revving a bit, shame that doesn’t cure everything!

K2-K6:
Good you've a successful outcome with fueling and now running well.

For interest, the idle jet circuit on these runs a long way up into rev range when used on light throttle. Any impairment has quite significant effect on clean running for most speeds up to about 40mph ish. It'll give you a weak cylinder further out too as the  main jet blends in with higher slide positions. Having the idle circuits impeccably clean is a big part of getting them running smoothly and consistent.

I still think there's spiders in there though ;D probably trained Japanese micro ninja spiders that know their job.

Navigation

[0] Message Index

[#] Next page

[*] Previous page