Hello all. I'm new to the forum, but am not new to motorcycles or working on them.
I brought home the daughter's beginner bike (XS400SG) that has sat unloved and unused for six plus years. At this point, I'm exploring my options. I'll probably scrub up the stock junk carbs to get it functioning, then go for the long-term fix.
Since the carbs are now full of yellow jello, and the BS34s aren't performers anyway, I'm considering replacing them with a set of new carbs from Mikuni or Keihin. Pushing me in this direction is that both diaphragms are about to go. By the time I throw enough new parts at these to make them run, I could have bought new several times over.
Dime City Cycles sells VM32s set up (jetted) for 400-500 twins. Around $130 each.
Jetting 185 main, 35 pilot, 6DH7 needle, 2.0 air jet, 159-P5 needle jet.
(Generic is 200 main, 35 pilot, 6DP17 needle, 2.0 air, 159 Q6 needle jet.)
Sudco sells several sets ready to go for Honda CB350s and the Kawasaki EX250. I'd guess that similar types would work very well for the XS400.
Anyone have experience with these? I ran a set of VM36s on my 1980 XS650, and it ran very very well. Drastic improvement in throttle response and seat-of-the-pants power output. It never ran well with the emission controlled 1980 BS34s. The older 1977 vintage BS38s were good carbs, but the later ones were crap.
Comments?
I brought home the daughter's beginner bike (XS400SG) that has sat unloved and unused for six plus years. At this point, I'm exploring my options. I'll probably scrub up the stock junk carbs to get it functioning, then go for the long-term fix.
Since the carbs are now full of yellow jello, and the BS34s aren't performers anyway, I'm considering replacing them with a set of new carbs from Mikuni or Keihin. Pushing me in this direction is that both diaphragms are about to go. By the time I throw enough new parts at these to make them run, I could have bought new several times over.
Dime City Cycles sells VM32s set up (jetted) for 400-500 twins. Around $130 each.
Jetting 185 main, 35 pilot, 6DH7 needle, 2.0 air jet, 159-P5 needle jet.
(Generic is 200 main, 35 pilot, 6DP17 needle, 2.0 air, 159 Q6 needle jet.)
Sudco sells several sets ready to go for Honda CB350s and the Kawasaki EX250. I'd guess that similar types would work very well for the XS400.
Anyone have experience with these? I ran a set of VM36s on my 1980 XS650, and it ran very very well. Drastic improvement in throttle response and seat-of-the-pants power output. It never ran well with the emission controlled 1980 BS34s. The older 1977 vintage BS38s were good carbs, but the later ones were crap.
Comments?