Mpg and how much does the tank hold?

No, I don't rage the bike at all - that's what seems to be the problem. As previously posted, I'm getting 69/70 miles per full tank, and used to get around 120 in Summer last year.

My last fill up went to a whooping 82 miles to a full tank. I think the Redex has helped achieve this.

A very baffled, and jealous, Mr Chin here!!!

Originally Posted by Mr_Chin

No, I don't rage the bike at all - that's what seems to be the problem. As previously posted, I'm getting 69/70 miles per full tank, and used to get around 120 in Summer last year.

My last fill up went to a whooping 82 miles to a full tank. I think the Redex has helped achieve this.

A very baffled, and jealous, Mr Chin here!!!

There is defo something wrong with the bike then. What year and what mileage is on it? Do you use a lot of oil?

Thanks for the reply ejohnh.

K3 (2003) with 11,500 miles on the clock. I just done the oil filter, air filter, new oil and plugs service.

Prior to changing the oil - it never dropped, i.e. was always between F and L, and never needed topping up.

I just thought that the weather affected the mpg, as it did to my idle tick over.

Chin

Originally Posted by Mr_Chin

Thanks for the reply ejohnh.

K3 (2003) with 11,500 miles on the clock. I just done the oil filter, air filter, new oil and plugs service.

Prior to changing the oil - it never dropped, i.e. was always between F and L, and never needed topping up.

I just thought that the weather affected the mpg, as it did to my idle tick over.

Chin

Maybe your ECU is mismanaging the mix?

[yorkie_chris]

Coolant temp sensor giving false low cuasing it to put the auto enrichment on IMO

What does the exhaust smell like?

Oh yeah if you're doing v short trips it'll drink a bit

Cheers Yorkie_Chris.

I'll give that a check on the multi meter.

Exhaust smells like stainless! Joke, it's running a bit rich since putting the new exhaust on - a bit of black soot around outlet and seriously big bangs from the pair system on decel, with some nice flames to match. I do a daily 20 mile journey - to and from work. The bike was doing around 120 miles per full tank in Summer. Only getting 70 miles a full tank at the moment, which is seriously begining to hurt my wallet.

Chin

+1 on coolant sensor, if not, do sv's run afm or map sensor?... 2nd point to look

[yorkie_chris]

AFAIK they have inlet pressure not manifold, no lambda sensor though

im keeping an eye on mine so i will let you know what i get to the tank full.

I am also having similar problems to Mr Chin (85 miles cost me ?15 at last fill up). I also have black soot on inside of exhaust which comes off on my finger if i rub inside of exhaust hole/baffle.

The bike is a k5s with 24k miles, which I actually only bought 2 weeks ago :/ not very happy with fuel economy especially as I haven't been doing anything stupid on it.

I'm convinced it is running rich as I can smell petrol a lot of the time, especially at startup, but I had a look at the air filter and it seems fine (looks pretty new actually). Everything on the bike seems in pretty good condition but this fuel economy is terrible. I have some redex to try, apart from that are there any diagnosis I can do at home to figure out why its running rich?

cheers