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Old 09-23-2008, 12:21 AM   #1 (permalink)
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Default Stability problem

Hello everyone

I have a problem
i own a Pulsar 150cc dtsi bike. recently i changed the rear stock tyre with MRF zapper 130/80/18 one. And i also raised the rear shocks too. Now i am facing a problem with the rear end stability whenever i cross the speed of 45km or something near to it, or whenever i bend the bikes at the curves.... theres a kind of wobble at the rear. I took it to the mechanic and he said that the rear bush (between the swing arm and the chasis) have been cut so as to replace the bush.I replaced it but its still giving problems.
Please suggest me what to do now....

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Old 09-23-2008, 09:52 AM   #2 (permalink)
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Old 09-23-2008, 09:55 AM   #3 (permalink)
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Quote:
Originally Posted by jabin View Post
Hello everyone

I have a problem
i own a Pulsar 150cc dtsi bike. recently i changed the rear stock tyre with MRF zapper 130/80/18 one. And i also raised the rear shocks too. Now i am facing a problem with the rear end stability whenever i cross the speed of 45km or something near to it, or whenever i bend the bikes at the curves.... theres a kind of wobble at the rear. I took it to the mechanic and he said that the rear bush (between the swing arm and the chasis) have been cut so as to replace the bush.I replaced it but its still giving problems.
Please suggest me what to do now....
The wide rear tyre has affected your bike's handling. Whatever you do, it not gonna go. Come back to normal stock tyre and will get the handling back. 130 is an overkill for p150. 110 would be ideal upsize.
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Old 09-23-2008, 10:27 AM   #4 (permalink)
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Quote:
Originally Posted by jabin View Post
Hello everyone

I have a problem
i own a Pulsar 150cc dtsi bike. recently i changed the rear stock tyre with MRF zapper 130/80/18 one. And i also raised the rear shocks too. Now i am facing a problem with the rear end stability whenever i cross the speed of 45km or something near to it, or whenever i bend the bikes at the curves.... theres a kind of wobble at the rear. I took it to the mechanic and he said that the rear bush (between the swing arm and the chasis) have been cut so as to replace the bush.I replaced it but its still giving problems.
Please suggest me what to do now....
whoa ho ho.....never tinker with ur suspension this way buddy,lower it again and see if theres any inprovement in cornering....wt rims are you using??the oe 150 rims or from the 180?any ways the oe ones which came wit ur 150 are thinner in width than the 180 ones which are wider and would aid the fittment of such a wide tyre better.
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Old 09-23-2008, 11:36 AM   #5 (permalink)
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Default Thanks a lot

yes i have changed the old 150 rim with a 180 rim.
i asked the mechanic was it caused due to the suspension but he said no it wouldnot make a diffrence.
but now i am surely going to get it lowered back to its stock position.
thanks a lot
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Old 09-24-2008, 10:01 PM   #6 (permalink)
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I fiddle around with the suspension a lot, i've stiffened the rear springs by two notches, and it has reduced the tail sliding antics considerably and gives better feedback while riding at high speeds and also is stable, though it comes at the price of comfort, also i feel that the 200 can perform better with a proper 110 or a 100 section rear tyre as the stock 120/80 is mostly show rather than go, these pics are a testimonial to how much a stiffer suspension can help you in cornering
Attached Thumbnails
stability-problem-c-14.jpg   stability-problem-c-31.jpg   stability-problem-c-46.jpg  
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Old 09-24-2008, 11:31 PM   #7 (permalink)
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Default wow

wow
well the pics speak that how much it can make a diffrence. well i will also try making a little hard.
Actually the problem with my bike comes when riding with a pillion. even at slower speeds it causes a little disbalance at the rear end.
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Old 09-24-2008, 11:35 PM   #8 (permalink)
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^ its normal.
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Old 09-24-2008, 11:48 PM   #9 (permalink)
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Default hey RPMBOY

dude is it normal that riding with a pillion the rear ends shakes a little, at the time of cornering, or it will the adjustment of the bikes suspension has got something to do with it. right now i am riding with a raised rear suspension.
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Old 09-25-2008, 05:29 PM   #10 (permalink)
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my bike wobbles even with a 110 rear and stock suspension height
actually almost every bike wobbles a bit

how did you increase height of the shocks
is it by welding a bigger connecting pipe ??
if so check to see if they are perfect and in proportion

and making the suspension stiffer will surely help increase stability
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