Compression

[Redneck rider]

Hey guys I just bought a 1996 Yamaha blaster that
The motor was blown I replaced the hole top end for it and new cylinder Pistons rings and seals and it ran great I was riding all the time and I barely had it a month but I didn't beat on it then today i drove
It and it ran could then it just got worse and worse
And I lost power, it still ran and drove but is sounds absolute crappy, and barely any power when it idles and idles could then when I open up
The throttle it sounds horibble , please
Help I need some ways to fix this thank you

 

[Awk08]

try a new plug, check reeds for all 4 petals and not cracked/broken, leakdown test, clean carb, delete TORS.

have you done any mods and plug chopped for them ?
what main jet, airscrew and needle clip settings ?

have you done a compression test ?
what were the results ?
or did you just pic a name for this thread out of a hat ? LOL

 

[blasterkid1998]

did you re torque head and base nuts, perform proper heat cycles, and leak test after the rebuild?

 

[Blaaster]

Leak test, check compression, remove the header pipe and look to see if the piston is damaged.

Did you leak test and heat cycle after rebuild?

 

[harley1-5]

have you ran a compression test and a leak test?those are where I would look first

 

[Redneck rider]

try a new plug, check reeds for all 4 petals and not cracked/broken, leakdown test, clean carb, delete TORS.

have you done any mods and plug chopped for them ?
what main jet, airscrew and needle clip settings ?

have you done a compression test ?
what were the results ?
or did you just pic a name for this thread out of a hat ? LOL

No lol I did test and I was getting reading of 100psi and I did the test 4 5 times

 

[Awk08]

No lol I did test and I was getting reading of 100psi and I did the test 4 5 times

holding throttle wide open and kicking until the needle stops moving ?

 

[harley1-5]

if its 100 psi something aint right

 

[blasterkid1998]

if its 100psi id pull the header to take a look at the piston

 

[Awk08]

I see "cylinder" listed in the first post as being replaced also ?
was this one of the el cheapo chinese ebay cylinders ?

 

[Redneck rider]

I see "cylinder" listed in the first post as being replaced also ?
was this one of the el cheapo chinese ebay cylinders ?

I bought it of ebay brand new with Pistons rings gaskets deals and the cylinder also came with a free air filter and spark plug

 

[Redneck rider]

if its 100psi id pull the header to take a look at the piston

What would I look for on the pison?

 

[Redneck rider]

holding throttle wide open and kicking until the needle stops moving ?

Yes

 

[Redneck rider]

A slow kick once we got 25 psi then one fast kick got us 75 psi and the after that it was 100 psi and didn't move after that

 

[speedyslyder]

that kit sounds like the cheap one, which has issues,link to it?
people on here have bought them and cylinder walls have chipped away/no compression

 

[Redneck rider]

did you re torque head and base nuts, perform proper heat cycles, and leak test after the rebuild?

I used a big socket wrench that was extra long for better leverage and no I did not do a heat cycle how do you do that and what is and how do you do a leak test and heat cycles
And ps I had a friend of mine whose a mechanic help me step by step throught the whole thing

 

[Redneck rider]

that kit sounds like the cheap one, which has issues,link to it?
people on here have bought them and cylinder walls have chipped away/no compression

Yep here you gohttp://m.ebay.com/itm/151399213143?nav=SEARCH

 

[speedyslyder]

i think members on here have you this same kit.
some have said it worked/some said the cylinder walls broke,but if they want they can share lol.
what compression gauge are you using...name of it?

 

[Redneck rider]

i think members on here have you this same kit.
some have said it worked/some said the cylinder walls broke,but if they want they can share lol.
what compression gauge are you using...name of it?

I wish I could tell you but I'm not to sure to be honest

 

[Redneck rider]

But luckily I still have the old cylinders