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Keep & Kill
Last Post: Crusty
Posted On: 3 Hours Ago
Replies: 37,124
Views: 2,467,588
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Members Birthdays
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31st May 2023
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Chief Harley Engineer
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Join Date: Dec 2022
Location: Piedmont North Carolina
Posts: 507 Sportster/Buell Model: XL 1200 Sportster/Buell Year: 2000 Sportster/Buell Model #2: XL 1200 Sportster/Buell Year #2: 1993 Other Motorcycle Model: H-D FLH Other Motorcycle Year: 1980
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Quote:
Originally Posted by Racepres
Bigger bore or certainly Stroke, will Never be OK with Shit Gas... Unless you reduce the compression somehow...No Matter the Engine... High Compression demands better Gas...
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^This! This!^ 89 octane is just not going to be enough. Why would you even want to use anything but premium in a hot rod?
Timing hole is roughly 8° wide, so edges of hole are plus and minus about 4°.
Jim |
31st May 2023
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Biker
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Join Date: Jan 2023
Posts: 74 Sportster/Buell Model: Sportster Sportster/Buell Year: 86
Reputation: 10
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So I will try some premium 92 octane and see if that helps if not I will pick up a bottle of octane booster.
What octane booster would you recommend?
And thanks to all who are trying to help me!
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5th June 2023
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Biker
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Join Date: Jan 2023
Posts: 74 Sportster/Buell Model: Sportster Sportster/Buell Year: 86
Reputation: 10
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Premium made no difference, ran across a couple sportster and they sound the same just a little quieter or more subdued but the sound is still there. So I am just going to stop worrying about it and ride!
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5th June 2023
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XL FORUM TEAM MEMBER
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Join Date: Feb 2013
Location: Let Freedom Ring in PA
Posts: 9,967 Sportster/Buell Model: Sportster 883►1200 Sportster/Buell Year: 1994
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Quote:
Originally Posted by treerat01
ran across a couple sportster and they sound the same just a little quieter or more subdued but the sound is still there. So I am just going to stop worrying about it and ride!
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Finding this out is not uncommon. Sportsters make noise.
Just keep an eye on the spark plug burn color to be sure you're not running lean. You want a light tan burn, not a pure white.
Did you use the straw procedure to find out what cylinder bore size you have?
http://sportsterpedia.com/doku.php/t...e_with_a_straw
IXL _______ >>>> My Motorcycle Chronicles Are Here <<<<
For Sportster Tech Info:
Ride On The Sportsterpedia - A Toll-Free XLForum Information Highway!
__________________
### The ride is more enjoyable to nowhere in particular! ###
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5th June 2023
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XL FORUM TEAM MEMBER
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Join Date: May 2010
Location: Pottstown PA.
Posts: 16,321 Sportster/Buell Model: XLCH stroker Sportster/Buell Year: 1960 Sportster/Buell Model #2: 883 C Sportster/Buell Year #2: '03
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^^^ hot rod motors generally have a looser fit with clearances than a stock motor.mostly in the piston/bore fit.
__________________
72 1000cc barrels and XLR heads, S&S 4-1/2'' flywheels, sifton minus-minus cams, S&S super A w/ zippers thunderjet w/yost powertube, Andrews gears,and shafts, 72 oil pump, Morris magneto w/auto advance and single fire module, cycle electric generator w/electronic regulator,73 cu.in.
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