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Re-jetting carb after installing v&h longshots

Purchased the longshots and retailer suggest: before installing ask manufacture about other modifacations maybe needed for such things as rejet carb? increase air intake? and better fuel regulation? in order to get better performance after instalation. My bike is a 1998 anniversary edition fatboy, 80 cub in, stock carb and air intake system. I need some advice. Thank You

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: Exhaust Popping Troubleshooting

My decel popping stopped as soon as I removed the air injection, but started back with aftermarket pipes. I adjusted the idle mix screws to richen it up and the popping almost went away.
Find answers/discussion at bonnevilleamerica dot com forum. Great sources for parts are bellacorse dot com, and newspeedmaster dot com. I don't know any European sourses for aftermarket bits.

Posted on Jan 10, 2009

  • 948 Answers

SOURCE: white smoke coming from exhaust

White smoke could indicate coolant in the combustion chamber. Not likely if you have an air-cooled bike. It could also mean that you are running in a cold climate, if the temp is around 20 or less I would call this normal.

If your bike is water cooled I would keep a close eye on your coolant level and oil level. A blown head gasket could allow water to get into the combustion chamber (causing the smoke) or mix with the oil (even worse). If you notice it using coolant I would have it checked out by a mechanic. If you want to check it yourself, do a compression check on both cylinders. If one is rather low, there is your problem.

Posted on Jan 12, 2009

  • 265 Answers

SOURCE: Replacement of front driver side window regulator

maybe it is like a maxima...

Posted on Jul 16, 2009

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SOURCE: Air box and crank case fuel flooding problem

Well there only one way the fuel can get into the crankcase and that's from the fuel tank. The petcock must be draining and the float needles are not stopping the fuel flow. Do you have a prime position on the petcock? If so do not run the bike in the position. Try topping the tank off with gas and letting it sit for a while and see is the gas has gone down and then check the crankcase and see if there's fuel in it again. i still say its got to be your petcock.

Posted on Sep 29, 2009

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SOURCE: Backfire and popping after installing vance & hines longshots

Let me know via if you get a solution, Mine is doing similar but mine is holding back at half throttle to, Wont rev high at all just chokes under load

Posted on Oct 20, 2009

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How to put on Vance &hines longshots on a 2002

Its very simple. I bet if you go on youtube you can find an instructional video on removal and installation. If you find a video of another brand, watch it. 99% of the pipes install exactly the same. I bet there are a total of 6 bolts all together

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Hi My XR 600 - 97, was taken off the road last May 2010 -I have purchased it in Dec 2010, and have slowly been restoring it. However yesterday when i took it for a spin, it was not reving smothly,...

Black smoke indicates a too rich fuel mixture. Be sure the air cleaner is clean. Install a new spark plug. Check what size the main jet is. The prior owner may have installed a larger than stock main jet. There will be a number stamped on the side of the jet. Call the dealer and ask what the stock jet number is for your bike and then tell them what you have. Go back to stock.

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The previous owner had the carbs jetted I don't know what size he added or whatever. But everything else is stock. The problem I'm having is the bike runs really bad and the fumes are bad when idling but...

Hi there,

The jets are for increased performance but the jets installed must be in relation to the pipe used. An open pipe would require larger jets. If the jets came with the pipe when the previous owner purchased it, then it should work. My advise would be to tune it up, sync the carbs, and time the sparks.

If all else fail, ask the previous owner to provide the stock jets and replace it. Stock jets along with the stock pipe will almost always run the first time. Sync the carbs and tune timing. If you have it all running smooth, from there you can do upgrades like stage 1 jet kit or purchase a performance exhaust.

Please do let me know if any of this was helpful,
I'll follow it up should my suggestions fail,

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1986 kawasaki ninja 600 i can get it to start up with the choke and get it to idle just sounds cruddy wont rev up very high either then when i shut it off it will not start back up again for awhile i have...

sounds like the carbs need cleaning...if its been stood for a while..petrol thats in the carbs goes you will need to take the carbs of the bike & take the float bowls off to clean them out...& do the jets as well...has these have small holes in them .petrol goes threw these & gum up....thats why your bike wont rev!!..its not getting enuf petrol!!...hope this helps

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Bike dies at idle, have to choke it even when temp is 95. only upgrade on bike I know of is vance and hines longshots

Most likely gummed up jets from sitting for an extended time. remove carbs and clean out jets. see if that solves your problem. before you do this though remove your fuel line after filter and check for adequate fuel flow.

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Bike sputtering & change of exhaust may nedd re-jetting??

generally when installing after market performance exhaust, jetting the carb is necessary. until you get ahold of the previous owner and find out if the carb has been jetted, you can try and adjust the fuel air mixture screw and see if that helps. and like any engine especially bikes, it is possible to sieze the piston. it can be riden, but be careful of over heating. hope this helps...

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  • First I would go get stock plugs from the dealer. Plugs with incorrect heat range can cause overheating.
  • Drain the oil and replace the oil filter. Refill the crankcase with fresh oil. Also be sure exhaust gasses are getting through the exhaust pipes okay
  • Check the spark timing. and clean or replace the air filter.
Your mechanic probably installed carb rebuild kits in each carb. This is good but the correct main jets may not have come in the generic kits he bought. Too small a main jet can cause overheating. Pull the float bowl of whichever carb is easiest to get to. Remove the main jet and look to see what size it is. There will be a number i.e. 3.0 stamped on the jet. Call your dealers parts department and ask what size main jet is stock. The smaller the number, the smaller the jet. Re-jet the carbs if needed.

I hope you can rate this solution as a "FixYa". Thanks!

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