Every now and then when my bike is cold, while riding it when i pull in the clutch and blip the throtle to down shift, i will sometimes get a back fire through the throtle body? anybody have this problem or know whats causing it? My bike is an 06 Fatboy V&H bigshot staggered, SE air cleaner.

Chris

 

To much blip

 

Yeah mine did it when i had the download, i now have the hd race tuner and the prob gone... i think the 06 models are leaner than other years.

 

Very similar problem with my '05 Heritage Classic. My dealer thinks I should pay for race tuner...guess I know which dealer to NOT buy my next bike from....It is clearly a too lean issue and they did ALL the upgrades before delivery. I have seen a couple of post about dealers installing the race tuner for no charge - which is what they should do.

 

My dealer gave me my money back on the download and installed the race tuner @ cost with free labor. that was as good as i could get with out a glock!

 

Well, I will give my dealer one more 'nice' try and then get ugly...heck, I've only had the bike since March why would I expect it to run right!

Don't get me wrong, I love the bike but H-D better watch out, the competition is getting closer and closer for less and less. Ten, twenty years from now they may be the ones looking for customers instead of us looking for bikes. But, hey, that is a conversation for another thread!

 

I dont think it is really harleys problem.

I think they are getting so stupid with the EPA crap that in order for a modified bike to compley you have to lean them out too much.

A dealership or a garage for that part is breaking the law if they knowingly modify a vehicle so it will not be EPA compliant.

This forum talked alot about the 06 air quality standards that was coming up last year.

Just wait till the next phase comes into effect.

David

 

Breaknbad...Its funny you mention that about the dealership breaking the law if they knowingly modify the emissions components against EPA standards. My delaership makes their customers sign a waiver stating that the bike will only be used for off road and track competition if they modify the exhaust, carbs, FI, etc. I wonder if that would really hold up in court if the EPA started prosecuting some of the dealerships who do this...

 

I was under the impression that the bulk of the regs are effective Jan. 1, 2006? If correct, Harley and in turn the dealers are doing things legally, for a few weeks...

Personally, I do not think these new EPA regs are going to change too much. Been this way for cars for years and plenty of modified cars out there. Just not completed by the dealers. Hey, I live in a no inspection State anyway!!!!

 

What kinda bothers me about your post is the 'bike cold, blip throttle' part. It's a lean condition, and since you don't say it is happening when the bike is warmed up, it's strictly a function of the engine being too cold for the particular map. While a better map will undoubtedly cure the problem, whether it's from a download, SERT, or PCIII, you're still potentially hurting the engine; at the least, decreasing its normal life span.

The FI bikes make it easy to get on, push the button, and ride off. But that doesn't mean you shouldn't let the engine warm somewhat closer to normal operating temp before doing so. An air cooled motor is not the same as our car motors. Tolerances are usually looser, and the separate case, cylinder, heads setup doesn't react the same as a car motor. This was readily apparent on the early Evo motors with the base gasket problem. HD followed the lead of several aftemarket companies and solved that problem. But the solution was and is a well thought out engineering band-aid. Nothing wrong with the fix, but it still requires a different thought process on the rider's part to eliminate any long term problems.

For all you FI riders, let the engine warm up a bit! You don't have to do it while sitting at idle in the drive, but can ease on out and do it on the road. But that means taking it relatively easy for the first couple miles until the motor is at normal operating temps. And relatively easy means no blipping the throttle.

Y'all take it easy! There's a whole bunch of us el-cheapos waiting to buy your used bikes. We'd like to be able to ride 'em for a few years before tearing the motor down!