Triumphrat

Coser2

Hi all

Lets see if I can explain myself ............... recently my Bonnie makes a rather strange plinking/slapping noise when opening up on the gas. This only lasts for a couple of seconds then when the speed is reached the noise fades away, just guessing but it seems to be coming from the cams or valve area.

What needs to be done, valve cam timing/clearance checked, bad gas ???

vertwrks

Coser,

I personally have not experienced any plinking or slapping sounds but you may want to run it by a bike mechanic to let him hear it.

My bike was carb farting due to lean at idle situation, thats about the only odd thing she has done but doesn't sound like the same thing. I really hope it is nothing, or at least nothing expensive to fix unless your just looking for a reason to get the 904 kit.

Tad

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bgaz

Maybe its just low octane gas causing detonation.
Many gas stations sell regular in all the pumps, a friend who used to work at a gas station said his did, and added some water to boot.

Brett

Coser2

Yeah Ive been told about the gas problem/trick, is there a cleaner or do I simply just drain the old fuel off and fill her up with a better fuel ....................


I just love Friday's
:-g :-g :-g :-g :-g

sweatmachine

I'd drain the fuel and get some from a reputable station.

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markbvt

Don't worry about it -- just add higher-octane fuel at your next fuel stop. I had the exact same thing happen to me, and switching to premium gas solved it.

I attribute it to my bike's mixture leaning out ever so slightly as the TORs that are installed age -- they pack out, and the internal perfed pipe is rusting, so they're louder and flowing more freely now than when they were new.

--mark

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FattRat

How many miles on the bike? Have you let it sit for any length of time without taking it out for a spin? When's the last time you checked your chain for either lubrication or adjustment?

Pour four ounces of SeaFoam, or a couple ounces of Marvle's Mystery Oil into a full tank of gas. Ride it through town and hit plenty stop lights to idle at, when it's warmed up do a few wide open throttle jack-rabbit-starts, then cruise for an extended period at 45 mph, 55 mph, and 70 mph.

When you get back, squirt some Bel Ray Clean Chain (wax) on your chain and wipe the sides down with some WD40. Address the tension if it's got more than an inch and a half slack mid-chain at it's tightest point.

Or take it to the dealer for a quick gander ($$$).

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RedBird

Just to add to what has already been said: Don't lug the engine in the higher gears. I never ride in 4th or 5th under 3000 rpm. If you do a lot of slower city riding, keep the revs up--it's safer, also, because you have acceleration available if needed.

Larry

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Larry
2003 T-100 (790cc), NARK, NH Togas, 8100 rpm rev limiter, 158 main jets, 42 pilot jets (less than 1 turn out on pilot screws), stock needles--no shims. 13 A/F ratio from 1100 rpm to 4000 rpm; 12 A/F ratio from 4000 rpm to 6000 rpm; 13 A/F from 6000 rpm to 8100 rpm.:D
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merlin

Look, if it's ping from detonation, that's a really bad think. We're talking mini explosions in the cylindar due to low octane or maybe other factors. Get highest octane you can in there and go easy on the accel until the situation subsides, or you further identify the problem as something else.
Google the whole ping/detionation thing.

ChuckT120

Not having heard the noise, here are a couple of anicdodal solutions. 1) I had a possible detonation problem when corned gas was mandated. Switching to the big brands from the corner store brand fixed the problem. As an aside, I recently pulled out the fuel tank valve and found the screens pretty well coated with a very fine brown powder that was non magnetic. The valve body was also jammed up pretty badly with the same stuff and there was some more in the hidden filter in the tee fitting. A recent walk up the street to a chem engineer who works in the oil patch with the paper towel containing the stuff got the opinion that it was a result of a lack of QA in the refining process. 2) While at a gas stop on a local trip, another Triumph rider pulled into the pumps and was complaining about a ping in his motor. I walked over to his bike and the chain was really slack. I dug out the tool kit and adjusted his chain for him. He pulled out of the station, went around the block and came back to say that the problem was cured.