Cleaned carb - revs high

check fuel pump --filter--cdi https://www.atvrepairmanual.com/suzuki-eiger-400-repair-manual/

This may be a vaccum leak. When extra air gets into the combustion chamber, it causes high idle. Check to make sure that all rubber hoses are tight and not cracked.

wrong carb boot?

Hey Elijah... the main jet on these bikes is not "adjustable"...it is a set sized jet.. what you did is probably fixed the air leak that was causing the rev issue..

It may need a good carb cleaning or a new spark plug.

there should be an idle screw on the carb, set it when the choke has come off. You'll recognise it because it will have a spring underneath it.
Dan

You have an air leak that is making the fuel mix too lean. Probably intake manifold gaskets. Other sources are reed valves chipped, deformed or broken, cylinder head gasket not fully sealing and crank seals gone bad. Your bike is 20 years old, I don't remember if your bike has reed valves.

The dealer is not going to have new parts. google " suzuki motorcycle parts " and " antique suzuki motorcycle parts "
also google " motorcycle salvage suzuki ". This should give you some sources for parts.

Please rate this solution. Thanks weldin_fool!

i fixed the problem simply by adjustingthe screws on th side of the carb. my dad had messed with it for an hour or so the day before... the next day he left town and after i spent 15 minutes or so dinking aroud it ran and idled fine. (of course if u ask him he got it close for me.) ( ;

Hi and welcome to FixYa,

Two possible reasons:

• faulty throttle cable. There should be a spring like feel when throttling/revving the bike. If none, then either the cable is broken or the lock has been dislodged from its hooking point between the carbs;
• vacuum leak. Another indication of a vacuum leak is relatively high idling RPM even when the choke is in normal position. Vacuum leaks could be caused by a cracked rubber connector from the carbs to the intake port, a loose/crack vacuum line or missing carb balancer rubber cap/cross-over.

Good luck and thank you for using FixYa.