I'm running stock headers, reverse cone mufflers and pod filters on my cb360t. I just picked up a set of vm30's from todd henning that were to replace my stock carbs. The mikuni's are supposedly jetted correctly for a mild cb350 and the guys at THR seem to think they should be fine for my mostly stock 360. So here's the question, do i stick with the already tuned stock carbs that are freshly rebuilt or throw on the mikuni's and hope that they are indeed setup "close enough" for my 360? I just don't know if it's worth the headache and need some outside opinions.
opinions please
- Thread starter fredp
- Start date
tWistedWheelz
BUILT NOT BOUGHT!
What is wrong with your stock ones? Why do you want to change them? If your looking for performance enhancement (try extends, hahaha, kidding 
) then I would say it is worth the headache of trying to jet it properly. Jetting will most likely be nessisary for proper running conditions.
) then I would say it is worth the headache of trying to jet it properly. Jetting will most likely be nessisary for proper running conditions.
Nothing is wrong with the stock ones, they were freshly rebuilt by the PO. The only reason i wanted to do the swap was that i'm more familiar with mikuni/dellorto style carbs, and like the responsiveness of round slide carbs.
PJ, No they were not cheap at all and after talking with them i had nothing but faith that they would be pretty damn close as far as jetting for my bike. Since i posted i got the carbs installed on the bike and only checked the main jet, which is a hex 190. It did however fire right up, got the idle set and took it up the road and back. The lowend and mid range seem pretty good, snappy, very responsive, the top end is questionable, sputtering/hesitation from 3/4 to full throttle. Pulled the plugs and they seem pretty dark. My experience with this type of carb is on 2 strokes and mostly dellorto's so any info you can offer is greatly appreciated.
If all else fails i've got the stockers to fall back on.
PJ, No they were not cheap at all and after talking with them i had nothing but faith that they would be pretty damn close as far as jetting for my bike. Since i posted i got the carbs installed on the bike and only checked the main jet, which is a hex 190. It did however fire right up, got the idle set and took it up the road and back. The lowend and mid range seem pretty good, snappy, very responsive, the top end is questionable, sputtering/hesitation from 3/4 to full throttle. Pulled the plugs and they seem pretty dark. My experience with this type of carb is on 2 strokes and mostly dellorto's so any info you can offer is greatly appreciated.
If all else fails i've got the stockers to fall back on.
Well let me ask you this, aren't the hex jets rated for smaller amounts of fuel flow compared to the round jets? All of the research i've done says that most people are running 130 - 150 round jets, so if the conversion chart i found is right, a 190 hex jet should have roughly the same amount of flow as a 130 round jet. Does this sound right?
those mikunis suck. give them to me and forget you ever bought them
in all seriousness... i have yet to see a carb that is sent properly "pre" jetted. get an assortment of jets and a book on working with the mikunis (sudco has one) and get them tuned properly. If the hex jets really are different, then the sputtering at the top end can be fixed by raising the needle a notch or two.
in all seriousness... i have yet to see a carb that is sent properly "pre" jetted. get an assortment of jets and a book on working with the mikunis (sudco has one) and get them tuned properly. If the hex jets really are different, then the sputtering at the top end can be fixed by raising the needle a notch or two.
ahhhhh you have real carbs!!!!say good bye to the cv junk,,,yes they are jetted to match a cb 350,,,,but happen to fit cb360 boots(thats handy)I think THR supplies with #175 mains and huge pilots(#45???) stock 350 with vm 30's and performance exhaust,,should be jetted at #165 6mm hex jet(+-),,,should be close to your cb 360,,,as for the needle and needle jet,,,,,,,no comment ;D
tWistedWheelz
BUILT NOT BOUGHT!
Swagger said:
Damn swagger, that little nurse been treating little lee well, cause you have been exceptionally nice lately!
Well the guys at THR we happy to replace the jets once i let them know of the mistake. The jets came in the mail this afternoon and as long as it doesn't snow tomorrow i should be able to give them a test run. Either way i'll be putting in an order for a range of smaller jets.
vm mikuni's,,,,,28?? to 34mm require cb 360 boots to adapt a cb 350 twin...and there not splayed(angled) like stock insulators.If you run stacks they will fit very tight to the down tube.another trick is to machine the spigot to fit the cb 350 insulator(boot),,,,,with race THR stacks(not my lump).......very slick ;D
