Yamaha SR250 carb rebuild, maintenance, tuning

In this video we take a close look at the SR250 Mikuni BS34 carburettor! All SR250's ever produced (from 1980 right up until 2014) came with this carb, so we hope it is valuable to as many SR250 owners as possible. There is a lot to cover, but have patience and you will be rewarded in the end with a smooth running engine!

It is a long video so we have broken it into some time stamps:
2:02 Intro to the carb
5:30 Opening the carb - removing the float bowl
7:50 Drain screw
9:01 Float bowl gasket
10:19 Float assembly removal
11:52 Inlet valve gauze and assembly
13:28 Pilot jet
15:34 Main jet
16:24 Top cap removal
17:19 Slide spring
17:42 Diaphragm
18:52 Needle jet
19:35 Air jet
20:56 Safe cleaning state
21:08 Choke assembly
21:47 Air fuel screw
25:45 Throttle screw
26:18 Butterfly valve
27:18 Reassembly begins
28:11 Float height
30:10 Float bowl reinstall
30:55 Diaphragm assembly - a closer look
33:18 Needle clip
34:29 Diaphragm assembly reassembly
35:59 Diaphragm rotation/position in carb
36:57 Resembling the top of the carb
38:09 On bike adjustments
38:35 Carb parts we offer

Any questions or feedback are/is warmly welcome - we will try to get to each and every one.

Parts mentioned in the video are available here:
https://www.jadusmotorcycleparts.com/...
https://www.jadusmotorcycleparts.com/...

Blog post with complementary information here: https://www.jadusmotorcycleparts.com/...

Cheers and happy wrenching and happy riding!