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changed 2/3 spacer to 1/2 spacer (Read 7 times)

azjay Serious Thumper Offline aridzona... its a dry heat Posts: 816 Gender:	changed 2/3 spacer to 1/2 spacer 05/20/06 at 06:07:22 with a 155 main jet is waaay too fat for us, it wont hardly run, and the exhaust is typical fat black. i think i'll change to a 152.5 with 1/2 spacer, will let you know. i checked the exhaust pipe at the head, the bolts took 1/4 turn each, but i wouldn't consider them loose. still chasing the backfire
Back to top	dyna muff,1/2 spacer,152.5,55,drilled air box,idle mix,spark plug door,harley bars & seat,spitfire windshield,turn signal,dunlops,man.pethingy,ISO pegs,engine cage,hiway pegs,support 81 IP Logged

Dynobob Serious Thumper Offline 2003 LS650 (with Supertrapp) Posts: 634 Northern Virginia Gender:	Re: changed 2/3 spacer to 1/2 spacer Reply #1 - 05/20/06 at 16:48:53 Going from 2/3 to 1/2 spacer will make your midrange richer. That would make your problem worse don't you think. Yes the 155 main jet is probably too rich for that muffler.
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azjay

Serious Thumper

Offline

aridzona...
its a
dry heat

Posts: 816

Gender: male

Re: changed 2/3 spacer to 1/2 spacer
Reply #2 - 05/22/06 at 07:18:00

that is what i wanted, was to fatten up mid range some, up until then, we still had a good amount of lean pop in the exhaust. i'm not sure what was going on, but it seems to have cleared itself up. we put 300 miles on yesterday(101*@ 9:30am & 110* hi), and 70 miles on saturday(105*hi). it is still a bit fat, which i normally wouldn't mind(actually prefer), but yesterday on the way home, we were running 70mph into a 25mph headwind, and the wife ran out of fuel at 70 miles, 35mpg? ??? wow! Shocked

bummer

thats worse than my harley Undecided

i'm thinking the 152.5 is going in next.

dyna muff,1/2 spacer,152.5,55,drilled air box,idle mix,spark plug door,harley bars & seat,spitfire windshield,turn signal,dunlops,man.pethingy,ISO pegs,engine cage,hiway pegs,support 81

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Dynobob

Serious Thumper

Offline

2003 LS650 (with
Supertrapp)

Posts: 634
Northern Virginia
Gender: male

Re: changed 2/3 spacer to 1/2 spacer
Reply #3 - 05/22/06 at 12:09:59

With a Sportster muffler you'd be better off with a 2/3 spacer, not the 1/3 spacer that you're running. You're too rich and needle and spacer is where you run most of the time.

You should be getting at least 50 mpg. Riding in a stong headwind will affect your mileage but not as much as you're down. Run a 2/3s spacer and life will be good.

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azjay Serious Thumper Offline aridzona... its a dry heat Posts: 816 Gender:	Re: changed 2/3 spacer to 1/2 spacer Reply #4 - 05/23/06 at 06:38:07 thanks, i agree, i should clarify that the muffler is actually a 17" straight thru (dyna i think) with the slot mount, not really much of a muff
Back to top	dyna muff,1/2 spacer,152.5,55,drilled air box,idle mix,spark plug door,harley bars & seat,spitfire windshield,turn signal,dunlops,man.pethingy,ISO pegs,engine cage,hiway pegs,support 81 IP Logged

azjay

Serious Thumper

Offline

aridzona...
its a
dry heat

Posts: 816

Gender: male

Re: changed 2/3 spacer to 1/2 spacer
Reply #5 - 05/24/06 at 21:02:31

i looked at the spark plug today, it is a milk chocolate brown (not black or rich chocolate), darker than tan. normally that is exactly the way i like to see them out here, however, 35 mpg on sunday sucked. i'm going to leave the 155 main in for now, and ride it back and forth to work (6miles @) and take another read at the end of next week.

dyna muff,1/2 spacer,152.5,55,drilled air box,idle mix,spark plug door,harley bars & seat,spitfire windshield,turn signal,dunlops,man.pethingy,ISO pegs,engine cage,hiway pegs,support 81

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