Recent content by neobrien

Update: it's been 5 years and I've been hard at work putting the motorcycle together! It's almost done but it's not starting and I figure it's the carbs. I found out what carbs they are, they're Mikuni BS34SS found on Suzuki GS450 E, L, and S models. proof is right here...

No because school started it is my intention to work on them over fall break, thanksgiving break and winter break.

Thank you xschris now the question is do I try and tune those carbs to my bike or just buy ones for the xs400? I'll have to think about it

I'll add that to the growing list of parts this awful carburetor needs. Thanks for all your help xschris!

After emailing customer service at mikesxs.net we determined (based on float bowl gasket and diameter) that I have carbs off an XS360. I understand that the air bleed pilot jets are hard to come by and they’re not interchangeable with non-air bleed but; that’s a problem for future me right now...

Sorry it took me so long to post, my pilot jet is 7.5 (Figure 1) and the main jet is either 5 or 7.5 (Figure 2) it was difficult to tell. The diaphragms don’t appear like they need replacing (Figure 3, 4 and 5). I plan on putting pod filters and may or may not be straight piping the bike so, I...

Thank you xschris! I can post a picture of the main and pilot jets and list their numbers tomorrow. I've compared the carbs I have and a BS38 and from the picture posted it seems they're very similar,

So if I buy the BS38 rebuild kit I should be fine since the gaskets are pretty close and the seals are the same.

so they're not BS34's for sure but we think they're MK1 BS34's does anybody know where I can find info on MK1's?

Hello All, My name is Nick and this is my first motorcycle project. I pulled out my carbs to rebuild them when I ran into a problem. First of all these are carbs are off a 1978 XS400, the top is labeled “MIKUNI KOGYO CO.LTD JAPAN” (figure 1), the inside diameter measures 34mm and inside the...