SV650.org - SV650 & Gladius 650 Forum - SV1000 throttle bodies on a 650?

Quote:

Originally Posted by yorkie_chris (Post 2122007)

Megasquirt?

Yeah, an open source FI ECU, not fantastically expensive (although not cheap) and fully programmable.

Quote:

Hayabusa could be a good call. Remember even if TB is huge you still need a smooth inlet tract so the inlet rubbers might be a problem.

You'd think so but IIRC I've seen somewhere that that's not always the case, here we go, now I don't know if this applies to modern bikes but from
http://www.beezanet.com/beezagent/ro...%20memoirs.pdf

Quote:

One of the strangest occurrances to do with carburettors was when one day Reg Wilkes sent an apprentice from the test shop into our,
main shop for a 1 3/32 GP carburettor and he misread the size and gave Reg: a 1 3/16th carburettor and they immediately got quite a
jump in power. They reported this to me and I went to the shop and the test was repeated and there was no doubt it was quite a gain in
power. I suggested to Reg to open the port to match, immediately we lost what we had gained plus a bit more, so we made a thin
sleeve and pressed it in and the power was back. We repeated this on other engines always with the same results. A number of private
owners of DBD Gold Star noticed the carb being bigger than the port and opened up the port thinking to gain power, but not having a
dyno were not aware of the results. Later on we fitted a venturi behind the carb and picked up even more power. The smallest diameter
of the venturi could be 80% of area of the carburettor. We tested this on several engines and it always worked and seemed to improve
carburation.

Druid