occasional clunk from under fuel tank!

NEIL COCHRANE · Post by **NEIL COCHRANE** » Sun Nov 23, 2008 9:21 pm

just bought 2001 model, first bike for 25 years!
has an occasional clunk at low revs from what appears to be under the tank; front cylinder? under load no problems. checked both CCT,s both appear ok. Bike covered ~21K miles

grateful for any suggestions[/img]

Stratman · Post by **Stratman** » Sun Nov 23, 2008 9:31 pm

You need to post this in the Bike section really, but in any event we would need a bit more detail to help

chuxsta · Post by **chuxsta** » Sun Nov 23, 2008 9:43 pm

NEIL COCHRANE wrote:
just bought 2001 model, first bike for 25 years!
has an occasional clunk at low revs from what appears to be under the tank; front cylinder? under load no problems. checked both CCT,s both appear ok. Bike covered ~21K miles

grateful for any suggestions[/img]

it might not be a clunk,, it could be the reputable pop they do when ticking over at low revs ... the one that also leads to it cutting out some times..

obviously it could be a totally different sound to the one im thinking. but i had the same worries when i first got my storm...

bikerpiker · Post by **bikerpiker** » Sun Nov 23, 2008 9:55 pm

Does it happen in neutrel ,

or only when riding at low revs

..if the latter could be something as simple as the drivechain needing adjusted

Oh ,and welcome

NEIL COCHRANE · Post by **NEIL COCHRANE** » Mon Nov 24, 2008 8:53 pm

clunk is a one off but intermitently; if that makes sense. u can actualy feel it through the tank as a knock!

LotusSevenMan · Post by **LotusSevenMan** » Mon Nov 24, 2008 9:45 pm

Welcome back to biking.

Tank rubber fixings worn/missing?
Seized rear suspension area leading to notchy movement that can be felt via the tank?
Does it do it with a full tank of fuel or a low tank or any amount in the tank (thinking low fuel warning light sender float here you see knocking side)

We need more to go on I feel.

bikerpiker · Post by **bikerpiker** » Mon Nov 24, 2008 9:58 pm

Does it happen when bike is stationary , or only when on the move

cupasoop · Post by **cupasoop** » Mon Nov 24, 2008 10:07 pm

Backfiring through the carbs, they all do it to some extent or other. Get your carbs balanced.

RedStormV · Post by **RedStormV** » Tue Nov 25, 2008 12:15 am

What he said

JohnD · Post by **JohnD** » Tue Nov 25, 2008 9:42 am

ditto

more of a fart in fact IMO

it worried me in the early days too - but you get used to it!

Post by **sirch345** » Tue Nov 25, 2008 11:14 am

+ 4 on the theory of the bike just spitting back through the carbs occasionally, they all do it now and again. What makes it sound worse is because the air box under the petrol tank is so big, it amplifies the sound

Chris.

Storm Trooper · Post by **Storm Trooper** » Tue Nov 25, 2008 12:56 pm

I agree with the carb issue,

Although it does sound hellish. Sounds like the piston slapping off the top of the cylider head. Worried me for a while till mines were balanced. Usually more noticable when cold.

cheers

Nig

Lucky13 · Post by **Lucky13** » Tue Nov 25, 2008 3:35 pm

Same here. Sounds like a carb backfiring (reverberating in the airbox)

Mine does it. My other Honda (Sohc4 motor) is prone to it too, particularly with the pod filters and modified fueling from stock.

If it's a 'now and again' issue then no worries. If it's a constant backfire/knock then grab a carbtune and sync them up.

Jbrebel · Post by **Jbrebel** » Tue Nov 25, 2008 3:51 pm

Mine did it quite often and was worse with a K&N fitted.

marravtr · Post by **marravtr** » Tue Nov 25, 2008 4:07 pm

got K&N on mine! so thats why mine does it then

used to it now tho

VTR1000.ORG

occasional clunk from under fuel tank!

occasional clunk from under fuel tank!

Re: occasional clunk from under fuel tank!