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post #1 of 8 (permalink) Old 02-26-2008, 10:21 AM Thread Starter
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Boggin FZR

Hi,

I got a problem with my bike. When im riding hwy/interstate If the throttle is held at a certain point it will bog down and i cant accelerate unless i downshift majorly. Then redline it just to stay at 70. if im city driving where a lotta up and down rpms its easy and wont bog down at all. is that just the bike or is there major problems. its piped and jetted (maybe) bought it like that. I really shouldnt have bought it but i wanted a bike badly. Any ideas of what it could be?
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post #2 of 8 (permalink) Old 02-29-2008, 05:11 PM
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Its tough to tell, for some reason I would investigate a fuel issue 1st. If I recall its easy to pinch the fuel lines on those bikes as I believe it has a remote petcock. If you could create the situation near you house, check your plugs and you would have an indication if you lean by white tipped plugs.

Note: on this bike (as well as most others) its not a good idea to turn off the motor at 60 mph and hold the clutch and coast to a stop for this test. Although it will give an excellent plug reading the problem is created without the engine running the clutch push rod gets hot and can cause some issues.
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post #3 of 8 (permalink) Old 03-01-2008, 11:40 AM
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post #4 of 8 (permalink) Old 03-03-2008, 07:40 PM Thread Starter
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Quote:
Originally Posted by indianaroadracer View Post
Its tough to tell, for some reason I would investigate a fuel issue 1st. If I recall its easy to pinch the fuel lines on those bikes as I believe it has a remote petcock. If you could create the situation near you house, check your plugs and you would have an indication if you lean by white tipped plugs.

Note: on this bike (as well as most others) its not a good idea to turn off the motor at 60 mph and hold the clutch and coast to a stop for this test. Although it will give an excellent plug reading the problem is created without the engine running the clutch push rod gets hot and can cause some issues.
So you think the fuel line is pinched? i guess that would make sense. And im guessing you meant "if YOUR lean by white tipped plugs." Another problem! If my bike is piped and jetted will it not start in 30 degree weather? see here in wisconsin 40 degrees is beautiful riding weather!
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post #5 of 8 (permalink) Old 03-03-2008, 08:05 PM
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i had a 94 fzr w/ somewhat the same prob.
i heard that they are know to have worn emulsion tubes. where the needle seats in the carb jet. they get worn and let fuel by b/c they dont seal properly.check this site out
http://www.factorypro.com/jets,needl...pilot_jets.htm

01 CBR929RE ------------- 01 DRZ400S SOLD ------------ 95 CBR900RR

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post #6 of 8 (permalink) Old 03-04-2008, 09:55 AM Thread Starter
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Originally Posted by dscort View Post
i had a 94 fzr w/ somewhat the same prob.
i heard that they are know to have worn emulsion tubes. where the needle seats in the carb jet. they get worn and let fuel by b/c they dont seal properly.check this site out
http://www.factorypro.com/jets,needl...pilot_jets.htm
how do i find out if it is these emulsion tubes? i dont want to spend over 400 bucks and find out its not them
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post #7 of 8 (permalink) Old 03-04-2008, 10:49 AM
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Another possiblity might be the sliders in the tubes. I remember those were prone to getting small holes in the rubber part causing them to function differently. One way to check is to simply remove the air box and use your finger to to lift and then release them. They should all fall at the same rate.
Also, depending on what type of jet kit, the air hole on these slides may have been drilled out allowing them to slide shut very quickly

If I had the bike at my shop/house 1st thing I would do is check the plugs and check the compression and go from there.
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post #8 of 8 (permalink) Old 03-04-2008, 12:55 PM Thread Starter
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allright ill check it out next time im home
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