Burning rubber smell when I choke-start

[Darkstar]

I start my bike with full-choke on, and then turn choke off once it reaches 4000RPM. It's running very well, so this only takes about 2 minutes. However, towards the end of that time I always smell a bit of plastic/rubber burning. Any idea what it is?

[bmf]

If I remember currently the owners manual says to keep the revs between 2000 and 3000 rpm for around 30 seconds,  or a little longer if very cold.
You might be running too hot/ high revs.

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[yamahonkawazuki]

agreed

[Darkstar]

Actually, my owners manual doesn't specify this. It states that it should be started with choke wide open, and run that way until it's warmed up.

[Big Rich]

Look for something burning on the engine / exhaust. Probably just something kicked off the road and stuck somewhere, but it could be a stray wire from the bike melting too.

Try running the bike in the dark (inside of a garage at night with proper ventilation) and using a flashlight to look for smoke.

[bmf]

See on Page 5-2 "starting the engine" under the chapter" riding tips".

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[Darkstar]

ok, i was only looking at section 3-9, thanks!

[sledge]

4000rpm, from cold, with choke, for 2 minutes??

I am surprised its not molten alloy you can smell