I have searched high and low and can't find an answer to this one.
I have a 77D , U.S. model apparently that I always thought was pretty much stock however it would appear P.O. swapped out carbs for some reason, and I now have bitsa carbs.
Specs say that I should have BS38 - 584's but after looking at the "Overview of the 38mm" on XS650 and at this chart amended with model numbers added by bluebikerblan posted 08/15/2011,
http://www.xs650.com/attachments/scan_doc0011-pdf.10321/
I now see that I must have 74-75 BS38-447's.
I have one throttle cable ruling out 256, 306, 366, no castings below butterfly's for connector plate, and one "Choke" on left side which rules out 533's and 584/E1E's. P.O has also added the diaphragm cover connecting plate that appeared on the 584's.
When tearing down, inspecting, cleaning , examining this weekend I found the following which also helps to confirm (I think) that I have 447's.
Needle 4N8
Needle Jet Z-6 (don't know if it's a short or long but it is 20mm long)
Pilot Jet BS30/96 45
Float needles 2.0
Butterfly's 120
Main Jet 120 (All I can read on one is 20, due to damage, on the other I can read 120. I have properly moded screwdrivers, P.O didn't)
Sorry for the long preamble but thought I'd better give all the details I could.
Now my question. Specs call for a main jet 127.5, mine is 120. I know that with carburetors a minute change can have have a major effect. Will this different main jet matter or should I order and install 127.5 mains before I button up, re-install and setup?
Thanks in advance.
I have a 77D , U.S. model apparently that I always thought was pretty much stock however it would appear P.O. swapped out carbs for some reason, and I now have bitsa carbs.
Specs say that I should have BS38 - 584's but after looking at the "Overview of the 38mm" on XS650 and at this chart amended with model numbers added by bluebikerblan posted 08/15/2011,
http://www.xs650.com/attachments/scan_doc0011-pdf.10321/
I now see that I must have 74-75 BS38-447's.
I have one throttle cable ruling out 256, 306, 366, no castings below butterfly's for connector plate, and one "Choke" on left side which rules out 533's and 584/E1E's. P.O has also added the diaphragm cover connecting plate that appeared on the 584's.
When tearing down, inspecting, cleaning , examining this weekend I found the following which also helps to confirm (I think) that I have 447's.
Needle 4N8
Needle Jet Z-6 (don't know if it's a short or long but it is 20mm long)
Pilot Jet BS30/96 45
Float needles 2.0
Butterfly's 120
Main Jet 120 (All I can read on one is 20, due to damage, on the other I can read 120. I have properly moded screwdrivers, P.O didn't)
Sorry for the long preamble but thought I'd better give all the details I could.
Now my question. Specs call for a main jet 127.5, mine is 120. I know that with carburetors a minute change can have have a major effect. Will this different main jet matter or should I order and install 127.5 mains before I button up, re-install and setup?
Thanks in advance.