rs50 losing power

[revmaster222]

recently my rs50 has been losing alot of power up hills and also seems a bit sluggish on flats. i took it to my mates and he said he thinks it needs new piston rings and his dad said its somethingf to do with the carb.

can anyone help please??
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hello

[TUG]

time for piston and piston rings change, your carb mixture setting might need setting again, do it fast before it seizes.
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Haz ER-5, innit!

[derbi x-treme]

have you checked the spark plug to check the jetting, is it standard or modified, did you rejet after any modifications?

[derbi x-treme]

have you checked the spark plug to check the jetting, is it standard or modified, did you rejet after any modifications?

[Evo]

How many miles(KM) has it done on that top end ? Suppost to rebuild every 7,000(KM). Listen to the engine at idle and rev in up to around 9,000 a few times. Noisy piston slap ? Check spark plug ect ect..

General things to give clues to a problem.
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Bikes owned
1989 VFR 400 RR NC30

[revmaster222]

the previous owner said that it had a top end rebuild bout 1000 miles ago, so it shouldnt be piston unless it was fitted wrong or was just crap in the first place.

there arnt any modifications i know apart from a sports exhaust but i've only had the bike a few weeks. im ringing the previous owner tomorrow to see where he had the rebuild done and what mods there are.

it wouldn't just be a blockage in the exhaust by any chance???

cheers for your help guys
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hello

[derbi x-treme]

it may not have been run in properly causing it to sieze by damage to the top end. or the carb may not be jetted properly

[-Elliot-]

maybe a cheap replacement piston was put in?

[revmaster222]

my dad took it to a garage to get checked out and it needs a new piston, cheers for ya help.

only 3 weeks til im on the road
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hello

[TUG]

wooo i win! check the carbs while its in mate and tune them in to the exhaust u've got, stay clean of crappy air filters you dont need, this throws off the air to petrol to 2 stroke oil mixture and could starve the engine of vital oil. you need plenty of smokey oil in a 2 stroke, gotta love that smell
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Haz ER-5, innit!

[puglad]

hi my pug trekker did exactly the same after fitting sports exhaust couple days later head cracked need new clutch clutch springs and rollers before this happens

just a guess btw
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pug speedfight 2 100cc

[Teaman]

a sports exhaust will require you to fit new jets to maintain a correct mixture.
if the guy says its had a rebuild 1k ago do you have proof, reciepts and such?
you should only use fully synth 2 smoke oil in the rs.

the checking of the plug is wise but do you know what your looking for? check the colour of the plug.
does it have the right plug?

do a compression test on it. always a wise move as that would give you a very good indication of whats going on. takes 5 mins to do and 20 mins getting to your plug port to do it probebly cost you £30 unless you know someone with a tester.


have fun

Stu
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There is no point in ranting about someone stupid because there is nothing u can do about it. There is no cure for stupid.
Someone stupid does not realise they r stupid.stupidity is indistinguishable from malice U just have to accept that some people are thick as p1gsh1t and work around them.

[rezzin]

[revmaster222]

took piston apart today, brand spankin new. took off exhaugst and found massive blockage, its running hell of alot better now.
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hello

[Dav1son]

the blockage wasnt the restrictor was it.
many come with a cone on the manifold side and a washer between the can and pipe.

glad its ok
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Future: ....
Present: GSXR-750 L0
Past: ZX10R C2H, TL1000R, CBR400 NC29, GPR50RR/RS50