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  #21  
Old 02-16-2004, 12:30 PM
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Default Re: High rev spluttering

Do a topend bro,IMO its time for piston and rings,check out the big end rod bearing also.
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  #22  
Old 02-16-2004, 12:49 PM
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Default Re: High rev spluttering

ive checked the psiton and piston rings there in great shape im not feelin it.. i mean i dont think im goin to do a top end im certain it dosent need it if it did this would be a permnent problem with the spluttering but its not more help would be great and i could do with a step by step on wat to do and check i feel paul is on the rite track thinking its the carb ive cleaned it but can u explain in detail more about what you think is goin on and wat i should do to cure it you guys have been great and i no 1 of u has the anwser and will help me solve this anoying problem thanks and i can still wheelie it in basicly every gear so its got power and is very nippy but i just cant get to use the the power band all the time
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  #23  
Old 02-16-2004, 12:56 PM
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Default Re: High rev spluttering

Quote:
Originally posted by Cr125zrule
the compression check showed it had 128 psi but on 1 kick it went up to 130 psi
WHAT?????????? You need to better explain that.

To do a compression test screw in the correct size adapter. Make sure the engine is cold...Hold down the kill switch and hold the throttle WIDE OPEN and kick until the needle on the gauge doesn't go up anymore.

If you did that and it only went to 130psi...HINT HINT..TOPEND!

Go back and read what Yardpro said in a reply after you said that...it needs to be atleast 150psi.

And you say you "checked out the piston and rings". How did you go about doing this? Did you pull the topend apart and LOOK AT THE PISTON...MEASURE THE RING-END GAP???
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  #24  
Old 02-16-2004, 01:01 PM
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Default Re: High rev spluttering

Having had a more than a little bit of experience with that carburetor I would suggest you turn your enrichener/idle plunger all the way DOWN tight. that is the one some people call the choke. They are notorious for passing raw fuel when it is set to idle at all. This is one of the biggest reason's that bikes with this otherwise very good carburetor foul plugs. DO THAT FIRST. It is fast, and costs NOTHING.

Then set your floats,,,if you dont know how to do that, and dont feel confident enough from what was already explained in my response as well as others do a search of this site.

After all that you will know that you are either on the right track or not, and it wont cost you anything. I agree somewhat about the worn upper end being a constant thing,,the other things suggested including the stator can be a come and go thing in some cases. (The stator more often than not shows itself after it's run for longer periods).
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  #25  
Old 02-16-2004, 02:18 PM
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Default Re: High rev spluttering

ok ill re do the compression check tomorrow and wat are u on about screw the choke in all the way my choke is done up tite are u on about the air-screw can u put a diagram to show me were on the carb we are lookin . my floats are done and do u mean u agree with me it would be constant intead of sometimes if it was the top end?? im slightly confused i could really do with some 1 writin me a step by step of things to do and check thanks for the replies and remember im 15 so u may need to expalin things a bit better but i now how to strip a bike and rebuild it so i no wat i mean when u are on about bearins and stuff as that happend to my last yamaha dt 125 well thanks
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  #26  
Old 02-16-2004, 02:46 PM
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Default Re: High rev spluttering

hi mate
this sound like a problem my mate was havin with his 93 cr 250, it was not reving out right, like it had a rev limiter but was not being over reved. i cleand and checked the carb, power valve, reeds and electrics... turned out to be the silencer was needing repacked. hope this helps and u can only do good by repacking it anyway to rule it out.
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  #27  
Old 02-16-2004, 02:50 PM
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Default Re: High rev spluttering

what do u mean new baffels? i saw they were a bit messed up the other day wat else did u do to ur mates bike ive cleaned my carb and have a great spark ( bright blue)
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  #28  
Old 02-16-2004, 03:22 PM
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Default Re: High rev spluttering

how do u mean messed up?? your silencer should be in perfect condition, the exhaust system on a 2 stroke plays a huge part of the running and power of the bike.. u can buy a new glass wool insert its about 30 quid from honda tho, or u can just ask a motorcycle shop for repacking wool its about 5..
i would give that a try firsts before stripping or messing about with it first.. if the silencer is in poor condition on the outside u will need to replace it with a new silencer. have u had a look at the reeds they may be chipped or cracked.
Try the repacking first tho and good luck getting it going well again....

Last edited by scotsguy; 02-16-2004 at 03:24 PM.
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  #29  
Old 02-16-2004, 04:10 PM
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Default Re: High rev spluttering

i ment the wool was all oily and riped my exzaust and silcenr are in great condition wat else could i try i still dont think its the engine itss self as it would be a more permant problem if u understand wat i mean
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  #30  
Old 02-16-2004, 04:14 PM
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Default Re: High rev spluttering

i would defo repack if the wool is goosed.. i think that may well be your problem. thats what was wrong with my mates and i tried everything else first.
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