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post #1 of 5 (permalink) Old 09-18-2011, 07:06 PM Thread Starter
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Default New V92c owner with problesm

Hello all, new here and new owner to a 1999 V92C. I rode the bike home barely, would not idle, did not seem to run on both cylinders most of the time.

Now here is some extra information. The PO rode it in the morning, I believe with old gas. When I went to ride it would not run right. What all should I clean and check, read some about throttle bodies. could someone give me some info? Should I be checking or changing the injectors? It has a stage one kit on it. I changed the plugs out and starts better but still does not run right. Blows some smoke out of the front pipe, really black smoke.

Any help is great.

thanks Travis
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post #2 of 5 (permalink) Old 09-19-2011, 02:11 PM
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Welcome to the family of '99 V92C owners... You will end up learning more than you ever thought you'd need to know about your bike before long...

As to the immediate issue... Old gas can clog injectors; also, it the bike was sitting long enough for the gas to go bad, there may be sludge or other debris clogging the fuel filters &/or injectors - in which case, a through cleanout of the injectors and filters may be required. If it's not too bad, you may be able to get by with draining the existing gas, adding fresh gas & some Seafoam or other reputable injector cleaner, and running it to (hopefully) clean things out.

If you do end up pulling the injectors to clean or replace, clean out the throttle bodies while you've got it apart; some clean rags, some carb cleaner, and maybe some Q-tips to get to the difficult spots. (DON'T drop a Q-tip or bit of rag down the intake passages!!!)

Another possibility is voltage-related; if the alternator hasn't been upgraded and is getting weak +/or you have a weak battery, the EFI computer gets confused and goes into a "run like crap" mode. Check your system voltage at idle; if you have an upgraded charging system & good battery, it should read around 14 volts at idle; original charging system will only show 12 volts or so, and doesn't really start charging until above about 2000 rpm.

Finally, check the Throttle Position Sensor - if it's going out, it gives incorrect voltage to the EFI. This usually starts out as a miss or engine cut-out at highway speeds, and gets worse as it continues to degrade.

Do some searches here; lots of detail and experience on these (and other) issues.

'99 V92C with K&N, PMRT chip, Vic stage 1 slipons, and engine by Rylan Vos!
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post #3 of 5 (permalink) Old 09-19-2011, 06:21 PM Thread Starter
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thanks for the advice. I have done some research for sure. great site. if i replace the throttle position sensor, does anything need done by a dealer?
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post #4 of 5 (permalink) Old 09-20-2011, 09:15 AM
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Quote:
Originally Posted by Atbyrne View Post
thanks for the advice. I have done some research for sure. great site. if i replace the throttle position sensor, does anything need done by a dealer?
It's possible that you may need to recalibrate the EFI when replacing the TPS; it's also possible that the replacement is close enough to the old one that no adjustment is needed... There's no hard & fast answer, but I'd do it just on general principles.

You'll be pulling the tank to replace the TPS; go ahead & clean out the throttle bodies while you have the tank off.

USE CAUTION when disconnecting & reconnecting the fuel line quick-disconnect - it's over $90 to replace the two pieces! When you take it apart, pull straight apart, not at an angle - this makes breaking it less likely (you may need to rotate the fittings a bit - this is okay, so long as you're pulling it straight out). When reassembling, be sure to press the latch in fully (don't rely on the "catch") or you run the risk of damaging the o-ring used to seal it by snagging it on the edge of the metal latch (IIRC, it's 5/16" ID x 7/16" OD - been there, had to replace it).

'99 V92C with K&N, PMRT chip, Vic stage 1 slipons, and engine by Rylan Vos!
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post #5 of 5 (permalink) Old 09-21-2011, 06:47 PM Thread Starter
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Thanks for the information. I plan to check on all of this this weekend.
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