Plug 2&3..fouled - Wrist Twisters
 
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post #1 of 8 Old 05-12-2011, 08:01 PM Thread Starter
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Question Plug 2&3..fouled

I hate to ask , but what the heck. I just bought my second 919(02 w 8900mi) and took it for a 100 mi shakedown run last night and almost didn't make it back home. Conclusion first- plugs 3 & 4 are fouled and wet. I cleaned them up enough to see that yes, they are getting juice and do spark. The previous owner said that he had a little rust in the tank from storage, so he drained it- acid washed it, and replaced the pump(&everything in the tank). He said he cleaned the injectors as well. The ride started fine but it did smell a little rich. The further I rode the more it began to surge and feel weak on low end. By mile 70 (well on my way back home) it was was sputtering and surging quite a bit, and stalled at a light or two if I didn't keep the rpms up. No hoses or vacuum lines were pinched under the tank... my conclusion is clogged injectors (2&3).. if so, are they a serviceable part or do they get replaced? what say ye forum dwellers? Thanks!

-J

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post #2 of 8 Old 05-12-2011, 08:44 PM
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2 and 3 fouled is indicative of a leak in the fuel pressure regulator... the ONLY common failure of the 919..

60 dollar part and 30 min ull be back up n runnin in no time.

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post #3 of 8 Old 05-12-2011, 10:26 PM
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Quote:
Originally Posted by nd4spdbh View Post
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^^ What he said.

#2 & #3 fouling is a classic sign of a bad FPR.

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post #4 of 8 Old 05-13-2011, 05:18 AM
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post #5 of 8 Old 05-13-2011, 05:55 AM
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I heard of another way to test the regulator ... if you take off the vacuum hose .. then you turn the key on to let the fuel pump prime up with the vacuum line off ... and if you get fuel out of the vacuum line then the regulator is bad ....

... Never take life too seriously ... Nobody gets out alive anyway ...
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post #6 of 8 Old 05-25-2011, 10:48 PM
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where is the best place to pick up a new fpr? i see on bike bandit its about $72....i've seen $60 floating around but dont know where that might be from (dealer? Online?)

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post #7 of 8 Old 05-26-2011, 01:45 AM
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Quote:
Originally Posted by velodesign View Post
where is the best place to pick up a new fpr? i see on bike bandit its about $72....i've seen $60 floating around but dont know where that might be from (dealer? Online?)

Here's one: Part #16740-MCZ-013 : $59.62 at Ron Ayers website.

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post #8 of 8 Old 05-26-2011, 09:44 AM
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Quote:
Originally Posted by yostevo052 View Post
I heard of another way to test the regulator ... if you take off the vacuum hose .. then you turn the key on to let the fuel pump prime up with the vacuum line off ... and if you get fuel out of the vacuum line then the regulator is bad ....
makes sense, sounds like a good check method

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