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› Still cant get over 60mph! Cant figure it out!
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Still cant get over 60mph! Cant figure it out! (Read 713 times)
speedingman
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Still cant get over 60mph! Cant figure it out!
04/25/09 at 12:45:56
Anyone know why, Things that ive done, new plug, new carb, fixed holes in tail pipe, new head gasket, checked valve clearances. Im lost, it makes no diference what gear im in i can not get over 60 mph, this is a 1996 ls 650 with 13600 miles on it, bike runs great up to 60! Not sure where to go from here. Any help would be great im at my wits end with this.
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speedingman
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Re: Still cant get over 60mph! Cant figure it out!
Reply #1 -
04/25/09 at 12:48:13
Sorry i have also been through the time twice and that is spot on!
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verslagen1
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Re: Still cant get over 60mph! Cant figure it out!
Reply #2 -
04/25/09 at 12:59:28
do you have a tach?
Is it reving high enough to go fast?
I'm wondering about your new carb, what jets?
Could it be a cable issue? Just not getting enough twist to go?
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speedingman
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Re: Still cant get over 60mph! Cant figure it out!
Reply #3 -
04/25/09 at 13:03:00
The cable opens the carb all the way. no i dont have a tach wish i did, i made sure i was getting 4th and 5th gear at low speeds it feels like there catching so i eleiminating the transmission, i was wondering about the carb myself. The carb is completely oem jets and all. when riding at 60mph the trottle is about 3/4 open, if i go past that to full throttle i acctual lose speed to about 55mph if that helps.
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speedingman
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Re: Still cant get over 60mph! Cant figure it out!
Reply #4 -
04/25/09 at 13:07:04
where can i find a faily cheap tach that will work with this bike?
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verslagen1
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Re: Still cant get over 60mph! Cant figure it out!
Reply #5 -
04/25/09 at 13:11:00
What size are the jets?
It could be they gave you jets for the current bike and it may be starved for gas at speed.
My '96 ran great with a 150 and stock pipe.
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Re: Still cant get over 60mph! Cant figure it out!
Reply #6 -
04/25/09 at 13:11:36
search tach, there are a few listed here.
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Charon
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Re: Still cant get over 60mph! Cant figure it out!
Reply #7 -
04/25/09 at 13:16:27
Check the fuel screen in the tank and make sure that's clear. If it is partly clogged it might restrict fuel flow enough to give a problem like that. You could just remove the fuel line from the carburetor, put the petcock in PRIme, and see whether the fuel flows freely (into a suitable container).
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Eschew obfuscation.
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speedingman
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Re: Still cant get over 60mph! Cant figure it out!
Reply #8 -
04/25/09 at 13:17:57
ok Im not familar with jetting and stuff whats involved and how much does it cost or should i try to send carb back and try another carb, when i bought this carb i had a hard time finding the right one because the oem for this year was discontinued, they gave my a updated or revised version could this be the problem? How can i know what jets are in this carb?
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speedingman
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Re: Still cant get over 60mph! Cant figure it out!
Reply #9 -
04/25/09 at 13:19:28
Yes the fuel flows freely because i just drained some today to run my lawn mower, lol.
But i will check again it was clear about 2 weeks ago when i painted the tank.
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Ed L.
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Re: Still cant get over 60mph! Cant figure it out!
Reply #10 -
04/25/09 at 13:37:49
Maybe the float in the carb's bowl is set wrong and causing a fuel starvation problem at higher RPM's. Are you getting any loud backfiring between shifts or black smoke out the pipe? Check the air filter and try a short ride without it just to see if there is any difference. If you are looking for a inexpensive tach and don't care what you use then look for a small engine or lawnmower tach. They are self contained, all you need to do is wrap the pickup wire around the bike's plug wire and hook up a ground.
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Silver '02, clubman handle bars, Cobra headlight, Sportster muffler, K+N stock air filter, 152.5 main, Superbrace, oil cooler, 1/2 inch aluminium plate forward controls, spark advance, goes like stink
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speedingman
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Re: Still cant get over 60mph! Cant figure it out!
Reply #11 -
04/25/09 at 13:46:55
I used to get alot of back fire before i adjusted the air ide screw and welded the holes that were drilled in the tail pipe. Now i just get and accasional pop when slowing down its rare though. Ive read about installing a clip or something on the main jet, though im not sure how to do this as im not much of a carb expert, im only 25 and all i know is fuel injection. lol. on Cars that is. Whats in the float that is adjustable do you have a diagram?
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diamond jim
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Re: Still cant get over 60mph! Cant figure it out!
Reply #12 -
04/25/09 at 13:50:41
Mine did that with one custom exhaust baffle I tried out and two different intake filter materials that I tried out. They caused too much airflow resistance on one side of the engine or the other to where the bike wouldn't get past 65. The problem was apparent momentarily at higher rpms when shifting through the gears and then persistently obvious at highway speeds. I'm not saying that either is your cause but pointing out that air flow on both sides as well as fuel problems can cause these issues. What kind of holes did you have to fix on the muffler? Was there a previous owner? Did they do anything to the muffler?
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Yonuh Adisi FSO
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Re: Still cant get over 60mph! Cant figure it out!
Reply #13 -
04/25/09 at 13:53:42
speedingman wrote
on 04/25/09 at 13:46:55:
I used to get alot of back fire before i adjusted the air ide screw and welded the holes that were drilled in the tail pipe. Now i just get and accasional pop when slowing down its rare though. Ive read about installing a clip or something on the main jet, though im not sure how to do this as im not much of a carb expert, im only 25 and all i know is fuel injection. lol. on Cars that is.
Whats in the float that is adjustable do you have a diagram?
The little tab in the center is carefully bent to adjust the float level. (picture courtesy of SavageWahine and her Carb cleaning thread
http://suzukisavage.com/cgi-bin/YaBB.pl?board=tech;action=display;num=1191899985
)
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speedingman
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Re: Still cant get over 60mph! Cant figure it out!
Reply #14 -
04/25/09 at 13:55:31
I think we may have something like that going on, Like i said i fixed the holes in exuast though this made no difference in performance just made the bike quieter. the air filter is i think it is stardard, its square black plastic with white filter and is clean. If its in this carb i am going to be so mad it took forever to get the thing and now it might not even be working right!
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