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Message started by Onepumpchump on 10/08/18 at 07:06:02

Title: Replacement Carb
Post by Onepumpchump on 10/08/18 at 07:06:02

Hello my brothas. Recently I have purchased a 1987 LS650 from its second owner. Bike has 5,000 miles on it, no previous wrecks, garage kept, in great shape. Previous owner re-jetted the carb so it would run rich, but it floods easily now, causing me problems on distance rides and occasionally when i ride to work. I'd like to throw on a brand new carb matching stock as close as possible, or replace with one that y'all suggest to improve function. Any suggestions for a newbie?

Thanks!

-Onepumpchump

Title: Re: Replacement Carb
Post by justin_o_guy2 on 10/08/18 at 09:14:43

Best buy is fix your carb.
Throwing a new carb on is way too much money.
Garage kept doesn't mean the carb isn't needing attention.

Miles, and any modifications, any other details are helpful.

Title: Re: Replacement Carb
Post by ohiomoto on 10/09/18 at 06:30:44

Are you sure it's flooding? Do you see fuel running from the overflow? Are you sure it's not fuel starvation?

Suggestions:

#1 Make sure you have a genuine Yamaha Raptor petcock. the stock petcock sucks and causes all kinds of problems. Some related to flooding and some related to starvation.
#2 Change your oil and make sure it's not contaminated with gas because of #1.
#3 Clean the carb and fuel tank. If the problem is intermittent, It's probably rust or debris getting lodged in the float needle.
#4 Replace the float needle/seat and adjust the float level if needed.
#5 Clean or replace the diaphragm/slide assembly. The coating on it wears over time causing it to stick. This would cause intermittent fuel starvation and it happened to me.