1978 fx. Backfires and misses.
Seasoned HDF Member
Joined: Jun 2012
Posts: 6,144
Likes: 2,547
From: CT/FL
Ss carb came with bike. Bought it this winter. Hasent run right since ive had it.
If I open up the throttle it sounds like fireworks pop pop pop. Dont know about how the mech has the carb set. He did the work and after he was done it ran perfect for about 2 days then back to ****. Ill find out the jet size on carb.
If I open up the throttle it sounds like fireworks pop pop pop. Dont know about how the mech has the carb set. He did the work and after he was done it ran perfect for about 2 days then back to ****. Ill find out the jet size on carb.
Road Master
Joined: Apr 2012
Posts: 979
Likes: 38
From: new orleans,la
large cam-- yeah that tells a lot-- I just did one where the dude put a cam for a 93" in a stock 74 yeah black pipes and a real dog -- he also had it wayyy over geared ..
whats the engine? 74" or 80" also whats your altitude where you live?? above 5000??
whats the engine? 74" or 80" also whats your altitude where you live?? above 5000??
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6th Gear
Joined: Jul 2013
Posts: 11
Likes: 0
From: South Dakota
Thats part of my problem. The info is lacking and i dont know size or whats in the motor. I was told it has a stroker kit. But Im having my guy tear it back down this winter and see whats in it and repair whats needing. The top was done not the bottom.
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6th Gear
Joined: Jul 2013
Posts: 11
Likes: 0
From: South Dakota
Got my title out today. Its The vin is 2f so when i looked up what that means it says its a FXS 1200. The engine is bored out but dont know what cc they do that too. Anyone help on that? Would guess they bore it out as big as they can. Last 2 on vin is H8 and looks like that is 1978. Has inch and 3/4 drag pipes. Didnt find out the size of jets on carb.
Whats the difference from a fx and a fxs?
Title also says its a lowrider
Whats the difference from a fx and a fxs?
Title also says its a lowrider
Last edited by Pasofinoguy; Jul 5, 2013 at 05:57 PM.
Seasoned HDF Member
Joined: Jun 2012
Posts: 6,144
Likes: 2,547
From: CT/FL
FX is any big twin with sportster front end, known as a super glide. FXS Low Rider is a ***** G special styling edition. FXE and FXEF are two other versions of the super glide. Different tanks, gauges and exhaust combinations. 35 years later, anything could have been changed, though. e.g. my FXS 1200 has an FXE tank and aftermarket exhaust.
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Club Member
Joined: Mar 2009
Posts: 66,106
Likes: 51,387
From: Niles Canyon Ca.
A shovel motor grows upwards of .080" and more as it heats up so you loose lift not get tighter . Too tight on the pushrods the bike would be farting out the carb and backfiring as you try to start it with solids .
