Paul Faunce (pfaunce "at" wwnet.com) wrote:
>While riding the bike back to the pit area it "starved" or bogged down
>repeatedly then quit again. It would not restart even when raising the
>spark cap to unfoul the plug. I figured the plug was permantly fouled
>so I loaded up the truck and went home. Today I tried to start it but
>nothing so I pulled the plug and checked for spark. It was nice and
>blue but electrode is quite DRY and dark brown. Next I installed a new
>plug hoping for a start or at least a wet plug. After 12 kicks finally
>the motor came to life but then 3 seconds later the RPM shot way up as
>if full throttle, the kill button was ineffective and pulling the plug
>wire did nothing. The motor quit (within 10 seconds) when I opened
>the throttle all the way. Needless to say I interrupted my neighbors Sunday
>family bar-b-que and my wife was not too impressed either.
>

>Fuel is 50-50 high octane mixed 70:1 synthetic.
>No visible air leaks near intake. I have not yet installed the extra
>flywheel wt. or changed the timing. All I have installed is Boyseen
>Reeds and I reduced the spark gap to .025". My next step is to remove
>the carb for inspection but I first wanted to know if you had any advice.
>Thank You Sincerely, Paul Faunce

The second aspect of this problem has to do with some mystery condition with Dell'Orto carbs. My carb leans out occasionally just like you describe, though turning or being on an incline is not a factor. I've learned to live with it. I know when it's starting to lean out, so I hold the throttle wide open a few seconds to vibrate the carb and get more fuel down to it. The problem will go immediately away. If you wait too long it will go really lean and die out completely. Very irritating!

The problem is manageable, so I have not put on a 24mm flat slide Mikuni like I have been threatening too. I may do that anyway this winter. I've been practice riding lately and have been very pleased with the bike since I put on a WP shock (to my specs.) on the rear. No more short-feeling and harsh rear suspension. The plushness of the `97 Section made me realize the `96 Boge rear shock is not very good. The gas-emulsion WPs I use, with my valving and body specs, bring the `96 up to 90% of what the Paioli shock gives the `97, for a whole lot cheaper.

The timing and flywheel mods make the motor a real delight. A 24mm flat slide would complement the low end grunt the modified motor produces. The larger 28mm Keihin may not fit in there as there is little room top to bottom. I am assuming the Mik is not as tall as the Keihin. Bob Ginder of B & J racing is a source for the Miks. His address:
b.j.racing "at" worldnet.att.net

-CJ

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