Erbman02 (User)
Platinum Boarder
Posts: 5492
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Re:Gas mileage blows 1 Year ago
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SKWEARpeg wrote:
Blackroadie wrote:
Cody wrote:
Now when u guys say poppin. What exactly do u mean by that. Also if no poppin than that automatically rules out a possible air leakusually if u have an air leak at the manifold (which I have had)..will cause popping and sometimes backfires out of the exhaust when you release the throttle. It also wont run or idle well when it gets to bad.
Ive had an air leak at the manifold and later, I had one at the header / muffler connection...both popped at decel.
Not having had to deal with this myself yet....KOW
Ever so often when this comes up, I've read here where people have done the manifold fix....ie surfacing, and or porting, and have been surprised to see their mileage go up. I believe several have even commented that the bike seemed to be running fine, but they saw an increase in mileage, after doing the mod.........oddly enough, I think it was on gas mileage thread .
What prompted my comment yesterday, was something Erbman had repeated after hearing, regarding the large number of bikes that have manifold issues right out of the crate. I imagine that the dealers let most if not all of these go thru, because there really isn't a noticeable difference. After all, "it's a new bike", and "if it ain't broke don't fix it" is probably an unwritten law at a dealership.
A bad leak, will give the usual results...ie something similar to the AIS port being uncorked. I would think a smaller leak would be skipped over as just a carb needing tuned. How many members on here, are running their bikes richer then needed?
Most new bike owners aren't able to wipe the grin off their faces for about a thousand miles, and without a resource like RSC, may just think their bikes are gas hogs. GF simply traded one Roadie for a new older Roadie, and was expecting similar results....
Having said this, it may just be GF's new bike, combined with not enough data input for a good read on mileage. GF will have to determine the latter, the former should sort itself out.
Espressodude took his bike(not new) into a shop and had it Dynoed, and they didn't catch the vacuum leak, but they did stick a really big main jet in the bike that resolved the lean issue. That worked for awhile, until the popping started and the bike became to much of a pain to ride. He did a quick check with some carb cleaner or ether, and the bike died IIRC. Others have done the check, and hardly noticed the droop in the idle.
How many members here, would see an increase in their fuel mileage from simply removing the manifold, surfacing the flanges and replacing it?
I find it interesting that the Roadies seem to be all over the map as far as performance and jetting, but for those who persist, they all tend to end up in a smaller bracket where their jetting is concerned. How many Roadie owners are out there, who don't show up here, and just think their bikes are thirsty. How many put pipes on their bikes, and just think the popping reminds them of their hot rod days. Look at the numbers of ten year old bikes on here, that had less then 20k miles on them when our members purchased them used, and had been owned by 2 or 3 different people(mine was one of those). Many owners, simply never get to know the bike well enough to know if it has issues.
Yeah, his comment surprised me as well, this was during a phone convo, and not sure if he ever posted this info on the RSR forum, but knowing him, it was probably posted at one time or another, I'm going back about 6yrs.
I also did this write-up after reading literally hundred of posts. This was the info at the time going around the RSR forum. Joel (Odo) was the go 2 man for carb related info, some of the old timers on here would probably know of Joel. He knew the stock carb but never got into the 42HSR.
My observations
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Re:Gas mileage blows 1 Year ago
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I just wanted to say that in my first 118 miles I used 2.5 gallons. I have done nothing to the bike since I got it but change the oil and gear lube. Today I did the brake fluid. I know nothing about what jets are in, when plugs were last changed, or even when the air filter was last cleaned.
I can say that when in 3rd just before 80 it does that breaking up thing (rolling 50mph drop to 3rd at wot) LOL For the most part I have just been 'nice' to the bike. I guess this next tank will tell me a little different story on fuel mileage, but if it's at or above 40 I won't fix it cuz it ain't broke... I don't think |
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Four wheels move the body. Two wheels move the soul.
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BMosley (User)
Fresh Boarder
Posts: 23
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Re:Gas mileage blows 1 Year ago
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Don't know what you are running but run 87 octane, not 93. Mine gets much better mileage with the lower octane. Yamaha actually reccommends 86.
Modify your pipes. Look in the tech forum and do the stage 1 stock mod, it is super easy and you end up with a descent sound. I ran that way for a couple of months and did the stage 3; sound is better and mileage is better
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Re:Gas mileage blows 1 Year ago
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Erbman02 wrote:
Yeah, his comment surprised me as well, this was during a phone convo, and not sure if he ever posted this info on the RSR forum, but knowing him, it was probably posted at one time or another, I'm going back about 6yrs.
I also did this write-up after reading literally hundred of posts. This was the info at the time going around the RSR forum. Joel (Odo) was the go 2 man for carb related info, some of the old timers on here would probably know of Joel. He knew the stock carb but never got into the 42HSR.
My observations[/quote]
I may have seen your write up clear back when I was just getting around here. I looked at alot of stuff. Thanks for linking it.
I was amazed at how many google searches I did at the time, brought me right back to RSC.
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