Decreased Fuel Range :-(

[Honda Al]

Hi all,

Since fitting my repro HM323 exhausts, the fuel range has decreased. I used to get ~95 miles before switching to reserve and now only get ~75miles.

Any ideas? Alan


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[florence]

what did you have fitted before?  Maybe it's breathing properly now?

[hairygit]

Check your jet sizes, often aftermarket pipes need larger jets to run properly, if you do have bigger than standard jets, that's where your fuel is going!

[Honda Al]

what did you have fitted before?  Maybe it's breathing properly now?

It was a 4-2 system.


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[hairygit]

Jetting may well have been altered before you bought it, especially if it's a u.s. import, the yanks love fiddling with things for no good reason! Also, it could be down to your riding style, revving high through low gears in town etc.

[Johnwebley]

also,check your airfilter,when I changed mine it made a massive difference,and it didn't look that bad .

[florence]

+1 with the main jet, it makes a huge difference.

[Honda Al]

Thanks everyone.

What other symptoms would the bike show/have if the jets were too big?


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[Johnwebley]

sooty pipes,

  no need to use choke ,

 sluggish performance

 dark plugs

[Honda Al]

sooty pipes,

  no need to use choke ,

 sluggish performance

 dark plugs

Hmmm, I have all four. I'm going to investigate this weekend.


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[Johnwebley]

if you find your jets are wrong,it may be cheaper to get a set of rebuild kits from Cruzimage,

 last year,a set of 4 kits was less than £40 ,p&p included direct from japan,

they are on Ebay

[Bryanj]

Or go to Sirius in Canada and get a multi size jet "Kit"

[Honda Al]

Had a quick look yesterday and it looks like I have 100 mains with 40pilots.


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[Johnwebley]

Had a quick look yesterday and it looks like I have 100 mains with 40pilots.


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 those are standard for (my CB500) a K2 ,not sure about US imports,
next check the ignition timing,is it getting to full advance ? try a ride without the airfilter,,see what happens