SiLENT RiDER

Hi friends...some weeks back i changed my p220 dts-i's rear sprocket(36 teeth) to p220 fi's sprocket(38 teeth)...in fi version the rpm safe limit ended at 9k rpm....but in dts-i it is at 10k rpm...my ques is had my bike's safe rpm limit decreased ...
should i take 9k rpm to be the new safe rpm limit?
...also what tpye of damage is the bike likely to have if i ride above the safe rpm limit?

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Aryan

Query Approved.

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jd666

Nope, if its specified in the manual that your safe limit is 10,000 rpm, then it will still be 10,000 rpm. the bigger rear sprocket will give you better acceleration, though a lower top speed, and lower mileage as well.

riding above the safe limit is not recommended since it can cause engine failure if done so for prolonged period of time. So use your gearshift and shift to a higher gear around the rev limiter.

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SiLENT RiDER

okie...thank you bro...

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nipunblaze135LS

rpm safe limit is 10k rpm,
and it will not change if u change the sprocket to any size.
The bigger the rear sprocket more is the acceleration but on the cost of top end.
and opposite for front sprocket.
and it is very risky to ride above safe limit rpm,
as far as i know p220 have a rpm limiter at 10.5k rpm so it will kick in when you exceed it.

SiLENT RiDER

thanks bro...but after putting a bigger rear sprocket I feel my bike is vibrating a lot more...what can be the reason?

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ashwin208

vibration could be because of non uniform tension on the chain. Basically, the chain is designed to handle 13/36 sprockets (front/rear) which is the one installed on the 220 dtsi...

dude im really sorry for being a spoil sport here...
But sprocketting is a highly risky area to do modifications with unless you are absolutely sure of what youre doing.. I wated to change my rear sprocket as well.. so i did a lot of research on the net regarding sprocketting...

it is NOT advisable to change only one sprocket. If youre changing either the sprocket or the chain , it is recommended that you change all three( front , rear sprockets as well as the chain). A safe way is to get a complete chain and sprocket set for the specific sprocket combo size that youre looking for.
And you need an excellent brand for it to be totally trouble free.. not sure if such brands are sold out here...

Why i say this is because, if the chain was designed to fit a 13/36 front/rear sprocket, then a chain will need to be a wee bit larger for a 13/38 sprocket. so a chain that is over tensioned can easily snap and shoot straight into the engine compartment or onto an unsuspecting person on the road. Can cause severe accidents.
Also, if one sprocket is new and the other is slightly worn out, the slippage chances of the chain are higher.
I am not saying that this always happens but there is a possibily. So according to me , sticking to the stock sprockets is the safest....
Please consider this.

SiLENT RiDER

i think you are absolutely right my friend.. because when I was researching for sprockets nowhere could i find a single sprocket being sold..it was in sets of three...front rear and the chain....will switch to stock rear sprocket tomorrow or day after...many thanks..

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Praful

The 38T rear sprocket is from the P200, the P220 Fi had a 37T rear sprocket.

The vibration have increased primarily because now your bike will be doing the same speeds at a higher RPM. With increase in RPM, vibes will increase. Similarly there would be slight reduction in 'overall' vibes if you had put a smaller rear sprocket and thus making the bike taller geared.

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SiLENT RiDER

should i go for pulsar 200's chain set(all 3 components)?
will it be a perfect fit for p220 dts-i?

how about the new pulsar 180's chain set? is it a perfect fit?

how much reduction in top end speed is expected in either case?

ashwin..praful...help me out bros...

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