Front and rear carburetor needle clip position – Virago 535
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Hi everyone,
I have a 1999 Yamaha XV535 Virago and I'm trying to confirm the correct needle clip positions for the two carburetors.
I recently opened the carburetors because I found that the needle assembly was not properly secured. One of the springs/retaining parts was missing, and the needle was loose inside the slide. I fixed the assembly and installed everything correctly again.
The problem is that I don't know what the original clip positions were. When I reassembled them, I put both needle clips in the same position.
According to the service manual, my needles are:
Front cylinder: 5DZ13-2
Rear cylinder: 5DZ14-2
The manual seems to show the needle codes, but it isn't very clear about the individual clip position for each needle.
After putting both clips in the same position, the bike became much better at mid and high RPM. I can ride at around 140 km/h and it runs very well overall. However, at low RPM it now has a noticeable flat spot/hesitation when opening the throttle, and sometimes it gives a small jerk/bump when I decelerate and then open the throttle again, especially at low speed.
Before I fixed the loose needle assembly, I didn't notice this particular jerk/behavior, although the bike was definitely weaker and the carburetor was not working correctly.
I have already adjusted the pilot mixture and synchronized the carburetors, and the idle is now much better. The remaining issue is mainly the low-speed throttle response.
So my main question is:
What is the correct factory needle clip position for the 5DZ13-2 on the front cylinder and the 5DZ14-2 on the rear cylinder of a 1999 XV535?
I found some information saying 5DZ13 = position 3 and 5DZ14 = position 4, but I don't know if that applies to my 1999 model/year or only to certain markets/versions.
Does anyone have a 1998–1999 XV535, preferably the same market/version, and can confirm the original clip positions?
Thanks!