89 Warrior w/87 carb

[jcole1325]

Finally got my 89 Warrior right.

A couple of years ago I rebuilt a 89 Warrior for a motorcycle class I took.

The engine was blown and I got it for $300. Anyway, after rebuilding the engine and putting it all together, I got it running.

But it never ran well. I rebuilt the carb over and over--with new carb kit. The carb was from an 87 Warrior but the carb parts were almost identical. The quad just never ran with power. After talking with many knowledgable people, we sort of figured out it was running lean. But why? Factory jets and 4,500 feet above sea level should be more than enough.

Last year I decided to spend money and took it to the local Yamaha shop. The had for 2 months and had 2 mechanics look at it. They got a flat spot worked out but it still had no power. It cost me only a $150 for many, many hours of labor, tuning and adjustments.

It still had no power.

In December, I called a local shop with a dynometer. They specialized in high-performance tuning, rebuilding and troubleshooting. Street 2 Sand, Reno, Nevada.

After the dyno emissions test, the air/fuel ratio was WAY lean. Over 18 to 1. They replaced the jets over many iterations. Got it going strong and dyno'ed for horse power, too.

Anyway, it now runs pretty good. The idle jet needs to be increased in size to give it a little more power off idle, but otherwise a whole new machine. Thanks STS.

Anyway, I have spare idle jets (at 0.009 inches) and I'll get someone to increase them by a thousands increment on 2 jets.

Thats all.

Jim in Reno

Edited March 14, 2012 by jcole1325

[oxidized_black]

good to hear you got it right now. persistance pays off ...

[jcole1325]

Thanks. I've been asked in the past what I've done to fix my performance problem--but never been able to give a solution.

JC