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post #1 of 14 (permalink) Old 05-28-2019, 03:56 PM Thread Starter
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bogging

i ordered a new choke cable for my magnum,what is the proper adjustment on the cable? Could this be why the bike bogs when you first touch the throttle, once you get moving it seems fine is it flooding itself maybe???
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post #2 of 14 (permalink) Old 05-29-2019, 09:01 AM
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Typically about 1/16 inch of free play on the cable before it starts opening the carb - would be helpful to know that year and displacement Magnum you have - I'm basing my guess on a 96 to 98 425 Magnum - here's the text from the manual:

Throttle Cable I Electronic Throttle
Control (ETC Switch) Adjustment
1. Slide boot off throttle cable adjuster and jam nut at
throttle block.
2. Place shift selector in neutral and set parking brake.
3. Start engine and set idle to.
NOTE: Be sure the engine is at operating temperature.
See Idle Speed Adjustment.
4. Loosen lock nut.
5. Turn cable adjuster out until engine RPM starts to
increase.
6. Turn cable adjuster back in until throttle lever has
1/16" (.16 cm) of travel before engine RPM
increases. Be sure ETC switch plunger is held
inward by throttle cable tension.
7. Tighten lock nut securely and slide boot completely in
place to ensure a water-tight seal.
NOTE: On 2 stroke models, whenever throttle cable adjustments
are made, always check oil pump adjustment.
Refer to pages 2.19 2.20 for adjustment procedure.
8. Turn handlebars from left to right through the entire
turning range. If idle speed increases, the throttle
cable freeplay must be increased, or check for proper
cable routing.

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post #3 of 14 (permalink) Old 06-09-2019, 02:08 PM Thread Starter
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i took the vacuum line off the carb that goes to the fuel pump and tryed it and it seems to run better but revs higher could there be dirt in the fuel pump or should i take the carb all apart and clean it good cause i adjusted the throttle cable from the last post and it didnt cure the problem it seems like its not getting enough air i installed a brand new air filter also so any ideas....
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post #4 of 14 (permalink) Old 06-09-2019, 04:08 PM
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Sounds like a bad fuel pump.
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post #5 of 14 (permalink) Old 06-09-2019, 04:55 PM Thread Starter
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so should i take the fuel pump apart blow it all out and try that ???
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post #6 of 14 (permalink) Old 06-09-2019, 05:19 PM
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Quote:
Originally Posted by stocky View Post
so should i take the fuel pump apart blow it all out and try that ???
If you unhooked the pulse line and it ran better with no bogging, the diaphragm in the pump is probably leaking fuel into the pulse line and intake.
What year model/size magnum you got?
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post #7 of 14 (permalink) Old 06-09-2019, 05:29 PM
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Looks like most all are the same anyway other than OEM are priced about four times too high lol... here's a link.

https://www.ebay.com/itm/Fuel-Pump-F...UAAOSwknJXx~9W
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post #8 of 14 (permalink) Old 06-09-2019, 06:31 PM
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Sounds like a good guess - I just replaced one on a 98 425 magnum along with a petcock - it cured his woes

2006 Trailboss 330
2002 Sportsman 90
2005 TRX400EX (FOR SALE)
2003 LT-Z400 (needs engine work & is for sale)
2004 CRF250X
1971 Triumph 650 Bonneville (has 5 original miles)
1972 Triumph 650 Bonneville (undergoing restoration)
1979 Honda CBX (6 cylinder)
1970 Kawasaki G3SS 90cc Bushmaster
1976 Suzuki RE5 Rotary (not running & FOR SALE)
1981 Kawasaki KZ305-A
1981 Suzuki GS450T (undergoing repair & will be for sale when done)
1982 Kawasaki KZ750-H (FOR SALE)
1989 Honda VT1100C
2007 Vectrix VCTX Electric Scooter
1965 Montgomery Ward 3 1/2 HP Tecumseh Mini Bike
1970 Triumph T25 250cc Trailblazer
1968 Triumph 250cc Flat Tracker

Shop Owner and Mechanic with over 50 years experience
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post #9 of 14 (permalink) Old 06-09-2019, 07:30 PM
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Quote:
Originally Posted by latebird View Post
Sounds like a good guess - I just replaced one on a 98 425 magnum along with a petcock - it cured his woes
Yeah, I think things like that are getting more common as alcohol takes its toll on rubber fuel system parts in these older machines. I just got done going through the carb, tank and lines on a 09 Rubicon. The carb was not really dirty but had little bits of stuff that kinda looked like grains of sand or something in the starter jet and slow jet. Couldn't really figure out where it was coming from or exactly what it was. I surmised it was probably from the interior of the fuel line crumbling up from alcohol exposure. The machine had set a lot last couple years.
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post #10 of 14 (permalink) Old 06-10-2019, 09:30 AM Thread Starter
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96 425 magnum 4x4
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