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Old Dec 6th, 2008, 06:55 PM   #1
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[FONT="Comic Sans MS"]ALOT OF GUYS AT THE LOCAL CYCLE SHOP WERE PUZZLED WHEN A GUY ON A NEW 883 CAME IN AND WANTED TO GO FASTER THAN 80 ON THE HIGHWAY

I HAVE A 1000cc IRONHEAD FROM 1982 AND ALOT OF GUYS THAT HAVE HAD THEM IN THE PAST HAVE SAID THAT THEY ARE BEAST" STOCK " AND EVEN MORE MONSTEROUS WHEN MESSED WITH.

A GUY I TALKED TO SAID HIS 1000cc IRONHEAD HAD THE JUGS BORED .030 OVER AND HAD A NICE VALVE JOB DONE ON IT AND A GUY MADE A STICKER FOR HIM WHEN HE WAS AT THE DRAGS THAT SAID " BIGTWIN KILLER " BECAUSE IT WAS...

IM ONLY 16 AND HAVE BEEN RIDING FOR ABOUT 1 YEAR, WOULDNT MIND SOME EXTRA HORSES CAUSE I GOT A STOCK 1000CC MOTOR AND I AINT EXACLY SMALL...




ANY INPUT / OPINIONS IS WANTED FOR MORE HORSES AS IM SURE IM SPEAKING FOR MANY

LeRoy[/FONT]
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Old Dec 6th, 2008, 07:23 PM   #2
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a suggestion....search the messages for all of artjr posts....he is very good with sportsters, has the hardware to back em up. his advice would be very good for you to follow. also try doing a search of sportsters....have fun and welcome!!!!!!!
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Old Dec 6th, 2008, 08:19 PM   #3
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If you do as chuck says you'll be ahead of the game , & when you do your search do ironhead sporster might save going threw a lot of the newer stuff/sporty models try google seems to get some good stuff on there
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Old Dec 7th, 2008, 01:04 AM   #4
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[COLOR="Navy"]Thankx for the kind words, Chuck & I'll be happy to give "82SPORTYKID" a tip - Ironheads love dual-plugged heads, it's not real expensive & any good machine shop can do it. The pistons have a steep dome & flame-travel is a problem, which is why the ignition timing needs to be pretty aggressive. But when you've got a spark-plug on either side of the cylinder, you get much more efficient combustion & you can slow the timing down - one benefit is the kicker won't throw you over the handlebars starting the bike You can run what I do in one application - a Crane HI-4 single-fire ignition with 2 dual-fire coils, one for each cylinder, so both plugs in each cylinder fire @ the same time, but there's no "wasted spark" on the exhaust stroke. Just have to figure out where to put the coil for the rear cylinder.

Also, a CV carb is a fairly easy switch & the engine will like that a lot. You have to change intake manifold & throttle cables, but those are available for Ironhead conversions. Another thing is Ironheads get hot, stay hot & are supposed to use straight-weight oil, no less than SAE 50. An Ironhead will cook multi-grade car oils in a heartbeat. And there's a Yahoo group called Ironhead Sportster Garage with a bunch of graybeards who know Ironheads inside out, fowards, backwards, up, down & sideways. They can be quirky bikes, but get one running right & they're loads of fun.

With respect to cams, those are always a compromise & I'd spend $$$ on head work, dual plugs & CV carb long before I would go with aftermarket cams that narrow the powerband & make tuning difficult. It costs so much to make an Ironhead (or any Harley for that matter) live @ high rpms that it doesn't make sense for anything other than all-out racing & they love the mid-range anyway. [/COLOR]

Last edited by Art_NJr; Dec 7th, 2008 at 01:11 AM.
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Old Dec 7th, 2008, 10:30 AM   #5
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Thanks for the tip Art I'm putting a CV carb on my 75 Sportty right now ...dual plug heads ...in the future.....
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