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Discussion Starter · #1 ·
Well, I know this has always been a big issue and talked about more than sex latley, however we are here on a bike chat and I wanted to share my findings. I receintly took my bike to my local mechanic, who I have trusted for many years. I had him install new tires and do a valve adj, and new stock NGK IFR5L11 plugs. At the same time, he talked to his dyno specialist after mentioning my plug fowling problem to him and he mentioned to reinstall my stock air filter, and also that my grounds are perfect. Everything was still stock except for the fact that I added a K&N filter, he said that there is much more air entering the system and with this, the air is cooler than with a stock filter. Therefore, the computer dumps excess fuel into her to compensate, which in turn fouls the plugs. I took her for a spin today with the stock paper filter installed, temp being only 11 degs C approx and the bike seamed to run better than it used to with the K&N, it just may be me, and temp related, however that was my surprising results. I will give a update as to my fuel milage improvement or not, with a couple of pics to show the plugs after a 1000 kms or so, so you better give me another day lol. Off topic but I have been running a K&N in my Civic for almost 10 years. I have never heard of this issue before now and plugs are perfect. It's very interesting. Can anyone relate to this, or was my mechanic just feeding me garbage info. Thanks
 

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I would say find yourself a new mechanic. Yeah there may be more air entering the engine, but more air requires more fuel. Also the IAT sensor will adjust the fuel mix for air temp. And to top it all off, the stock computer will only comp so much, it has a preset map that it runs. So you can add air filter, change pipes, change internals, and it will still supply the same amount of fuel.
 

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Any engine will run better with a fresh set of plugs, a clean air filter, and the valves adjusted properly. I'd say clean the K&N, put it back in, and fina a new mechanic. But that's just me.
 

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Sounds like your mechanic knows carbs better than FI, especially on bikes. I won't be so harsh as to say find a new one (a wrench you can trust is hard to find) but it seems he is definitely outside of his realm of understanding with this FI motor. I suggest letting him do basic stuff but any real motor type problems check on here and try to do them yourself. :wink:
 
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Most two wheel mechanics have no clue what’s going on in respect of Fuel Injection. Pretty complex and without an after market fuel manage system not adjustable.

Anyway, I hope you guys synchronized the throttle bodies. This lead also to fouling.

I found more fouled plugs on engine when the rider let “WARM UP” the bike. Sitting there for 5, 10 minutes idle. Wrong call, the 1800 engine don’t like this and carbon build up is enormous.

When it’s cold put your gloves and helmet on, this give the engine enough time to deliver oil everywhere. Hop on and ride – warm the engine up during riding not sitting. HD’s have to do this because of stalling. Their motor has the tendency to stall when cold. Slow small turn out the parking lot – engine stalls, crash happen very fast.

Paper filter (stock) vs. K&N, it is just plain nonsense to say the paper filter is better. Correct way to say this: a clean paper filter is better then a dirty reusable filter. As mentioned before, clean your K&N and put’m back in.

Here is how to do it…
http://www.knfilters.com/clningins.htm
 

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Discussion Starter · #6 ·
Thanks for your comments and help guys,
and a special thanks to you guys VTX Rocketeer and Bare, I really respect your opinions and suggestions, and Bare, love your website man, it's full of great information.
I haven't done the ground fix yet either, apparently Honda said that my bike was not one of those affected. I will be doing this anyways, because I don't see a very good ground to the frame like your pic's show, although the engine ground is done properly. Maybe this is all that I need to solve the issue. I'll give it a shot and let you know. Thanks again.
Larry
 

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larboy said:
Thanks for your comments and help guys,
and a special thanks to you guys VTX Rocketeer and Bare, I really respect your opinions and suggestions, and Bare, love your website man, it's full of great information.
I haven't done the ground fix yet either, apparently Honda said that my bike was not one of those affected. I will be doing this anyways, because I don't see a very good ground to the frame like your pic's show, although the engine ground is done properly. Maybe this is all that I need to solve the issue. I'll give it a shot and let you know. Thanks again.
Larry
Honda won't acknowledge there is a ground problem at all, it IS a problem though. :wink:
 
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