07-02-2012, 11:01 AM | #1 |
Gone Wild
Join Date: Jun 2011
Location: Bowling Green, VA
Posts: 157
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71 Harley wont go past idle
Posting this for a friend. He recently bought a 71 harley which was running great. Last night while riding it stopped. It will idle (with help from the starter/gen) but not rev enough to engage the clutch and run. We did notice while towing him home that if he hits the gas while being towed at speed, or pushed, the motor will fire and run properly until he stops. Any ideas?
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07-03-2012, 09:22 AM | #2 |
Gone Wild
Join Date: Aug 2007
Location: North Texas
Posts: 2,312
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Re: 71 Harley wont go past idle
bad compression or crankcase seals. Check compression first should be around 80 to 100 PSI + or - a little.
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07-03-2012, 01:47 PM | #3 |
Gone Wild
Join Date: Apr 2009
Location: Milton Wi.
Posts: 708
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Re: 71 Harley wont go past idle
check to make sure you have gas and spark.
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07-03-2012, 02:01 PM | #4 |
Gone Wild
Join Date: Jun 2011
Location: Bowling Green, VA
Posts: 157
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Re: 71 Harley wont go past idle
Gas and spark are all good as well as around 100 psi of compression. Also, took off the carb and cleaned it up real well, didn't rebuild though. Maybe its something there. I'm only familiar with gas club cars, what kind of fuel pumps do these things run?
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07-03-2012, 06:27 PM | #5 |
Gone Wild
Join Date: Aug 2007
Location: North Texas
Posts: 2,312
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Re: 71 Harley wont go past idle
It runs on crankcase vacuum!
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07-05-2012, 12:03 PM | #6 |
Bad *** Speller!
Join Date: Oct 2009
Location: Columbus, Ohio
Posts: 1,338
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Re: 71 Harley wont go past idle
woly, like tony says it uses engine crankcase vacum, unlike cc that uses a pulse line from the crank case to a pump on the side . the pump is actully in the carb itself. go get you a rebuild kit. i know a cetian local national parts store that everytowwn has, small or big carries a rebuild kit for it. its a tilson, but for get the number....i know tony or graig can get the numbers, i was told one has the needle, and one just the gaskets and screens. also make sureyour gas is good. this new crap they run is bad with carbs! i cant let it sit longer then a month with out any kind of fuel stabilizer with out it going to the crapper!
just a thought |
07-06-2012, 04:34 AM | #7 |
Gone Wild
Join Date: Apr 2009
Location: Milton Wi.
Posts: 708
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Re: 71 Harley wont go past idle
Tew said it to begin with. check compression
just a simple pull the plug put your finger in the spark plug hole .turn the motor over and see if it blows your finger out. if you can hold it back easy it's time for a top end rebuild. you can also pull the exhaust off and look at the piston n rings. the exhaust side always takes the beating when the rings go. |
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