will it work?

[Type_Mo]

Cant afford a 17cc bore kit, so if i got the 170cc piston can i get my barrel re-bored?

will it run ok?
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- Typhoon ?0 - Yamaha DT125R - Aprilia SR125 - Yamaha DT125R - Honda Hornet 600 -

[sickpup]

No. Not enough meat.

[satans_BIG_helper]

I assume your asking wether a standard 125cc barrel can be bored out to 170 cc ??

If so

"computer says no" (been waiting to use that lame line for a while now)


There is no where near enough room to bore out a 125 to 170... its like roughly a 40% capacity increase and the most a normal barrel can be bored out is by 2mm which is not much :S


Just stick with the 125 and save up for the 170 kit or buy a bigger bike

[Andy C]

yea, if not done right will make it really unreliable and will need new gears if you want higher top speed, really no point and you havnt passed yet!!
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99 RS125 --> 02 SV650s --> 03 Speed Four --> 92 RXS100 --> 93 CB400sf --> 01 CB600f Hornet

[Type_Mo]

Cos i heard about someone boreing out a 100cc moped upto 125?
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- Typhoon ?0 - Yamaha DT125R - Aprilia SR125 - Yamaha DT125R - Honda Hornet 600 -

[Andy C]

yea im sure you could bore it out a bit but you make ruin its reliability, also everything on your bike was built for a 125cc not a 170cc, parts could fail if it was uprated, im sure most wouldnt i just think getting a igger bike so much of a better idea, esp when 2ts ate involved
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99 RS125 --> 02 SV650s --> 03 Speed Four --> 92 RXS100 --> 93 CB400sf --> 01 CB600f Hornet

[Jack_Cheese]

I wouldn't buy a big bore kit, you normally keep the standard head and crank case, though a dt125 may require a new head. The extra power will require a reinforced crank shaft and con rod (or it is at least a good idea to buy and fit a strengthened one) although it will run on a standard one. It will also put more stress on the bearings, and you'll have to increase the jet size or get a bigger carb. Replacing the chain and altering the final drive ratio would be a good idea, too. A new exhaust may be needed aswell.

If you can't do the majority of the above, especially the carb and exhaust, then you will probably become acquainted with "Bang Fizzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"

Jack
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www.bikepics.com/members/jackcheese <--- NOW FOR SALE! 51 Plate Cagiva Planet 125
Quacker_boy: "Jack, you really are a dick!"

[jonnay]

My mates DT125 (pic of it on my website) had a 170 kit on it, and that went like fook It was only a field bike, but my god, it flew, and wheelied for England.

He left the gearing as standard too, for accelaration

Don't know about reliabilty, but they seem pretty indestructible
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::'04 Yamaha Jog:: || ::'01 Honda NSR:: || ::'00 Suzuki Swift:: || ::'89 Swift GTi:: || ::'96 Swift Poverty Spec:: || ::'92 Swift GTi::