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Motorcycle Repair/1970 Honda SL350 K0

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Question
Hi Bill,
I have a 1970 Honda SL350. The frame and the title both state the motorcycle was built 1/1970. The engine has the model listed as SL350E. Can you tell me what the E stands for? I also want to know if you can tell me if it is a K0?  It does have a steering stabilizer. I am also rebuilding the carburetors and the only marking I can find on the carburetors is SL3A which I have not seen before. I bought two kits, the first one is KH-1223 but it did not come with the imulsion tubes. It came with a 70 jet and when I asked about it I was told I would have to use the 70 jet because they don't make 68s anymore.  I had to buy the second kit #25-90336 because of the parts not included in the first, but it also came with a 70 jet. The second kit says it is for CL350 or CB350L 70-73.  I was wondering if you know if the jets and imulsion tubes from the second kit will work in the carbs I have. If you need more information from me please let me know.
Thank you for any help you can provide.

Answer
Steve, Honda marks all engines with E serial numbers to differentiate them from the frame numbers.

Only the 350K0 models had the CB/CL series CV carburetors (SL3A) with primary/secondary main jets.

According to my specs the K0 carbs have a #70/105 main jet set with #35 idle jet. Set floats at 26mm.

There are numerous other calibrations for CB/CL350 carburetors and sometimes the a/m kits do not have the correct combos.

1/70 build date would be a SL350K0 model.

The second kit is listed for round bowl carburetors, but I think the emulsion tubes are not the same as they have different part numbers between round and square bowl versions. Compare your new/old parts to verify.

Bill Silver  

Motorcycle Repair

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Bill Silver

Expertise

Need help with vintage Hondas from the 1960s? I am an expert with 250-305cc bikes in particular and most all of the other pre-91 models, in general. I do NOT claim to have a great deal of experience on Gold Wings, Cruisers, ATC/ATVs and dirt bikes.

Experience

I have owned/ridden/maintained Honda motorcycles for 35 years. I have written five books on Honda repairs and collecting. I was a service manager for two Honda shops back in the 1980s.

Organizations
VJMC (Vintage Japanese Motorcycle Club) of North America

Publications
VJMC newsletter, as editor for two years and as contributing editor currently.

Education/Credentials
3 years auto shop in high school, teacher's aide in Automotive Technology in Jr. College, Diesel mechanic course in college, self-taught mechanic and automotive writer.

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