@horseye20008 i just bought a 2004 blaster and mine also knocks when im cruising in 5th gear...it is bord 40 over..any idea what it may be?makes the same noise as yours does:/please dont tell me the engine is fucked:(hope its the same problem as yours.the fuel filter is bad,i have a new one on the way and also a k&n filter and new sprak plug..think any of this is going to help?i fricken love my blaster and can stay rite up with my buddies banshee!little shit is a fast mother fucker!thanks
could be ur carb dirty or could have leak in air intake take air hose off and put ur hand over mouth of carb press hand and let off and it might stop knocking ?
@oneword4letters dont get one dude i just got a 2000 bored out to 240 and after a few rides already have problems, get a ltz, raptor, honda ex, or kfx, some kind of four stroke, things last for years
it's not knock it's just how it sunds 2 stokes make alot of wierd noises like that so u dont half to worrie till it's something really off i have a 98 blaster and im one bore under the big bore and mine makes the same noise when it's cold and if it has the stock pipe it makes that noise
@fcanane1 It actually turned out to be piston slap, even though my 240 kit was brand new it wore that quickly. The bottom end was fine and it runs great now that the stock top end is back on.
@horseye20008 oh lol, i used to have a blaster and the crankshaft bearing went so i slaped the top of the cylinder head. but i have never heard of a 240 making the piston slap. the only way you can get piston slap is if your bearing have slop in them, but i could be wrong. atleast your blaster is running perfect and not mine lol
@horseye20008 - was there up/down play or side to side play? I just rebuilt the top end of my yamaha rt 180 and it sounded exactly like that before and after too. I couldn't detect and up/down play on the rod at all, but there was some side to side clearance. Did you replace the rod and lower bearing? Perform any work on the crank? Thanks.
@chadr00 well i haven't got into it too deep yet but the rod seems to have quite a bit of up and down play. I'm going to put a new crank in it so hopefully that fixes it.
@253cjm I just got the engine out, haven't torn it down yet. I have a feeling it's the big rod end bearing because the top end is new but the bottom is all original.
@horseye20008 i just bought a 2004 blaster and mine also knocks when im cruising in 5th gear...it is bord 40 over..any idea what it may be?makes the same noise as yours does:/please dont tell me the engine is fucked:(hope its the same problem as yours.the fuel filter is bad,i have a new one on the way and also a k&n filter and new sprak plug..think any of this is going to help?i fricken love my blaster and can stay rite up with my buddies banshee!little shit is a fast mother fucker!thanks
wildman261 4 days ago
you know what its not knocking retard its a 2 stroke
okazgra 2 weeks ago
Comment removed
troy5251 2 weeks ago
nice i got the 2002 yam 200cc
lonewolf3358 4 weeks ago
could be ur carb dirty or could have leak in air intake take air hose off and put ur hand over mouth of carb press hand and let off and it might stop knocking ?
woodzville420boy 1 month ago
Do blasters have problems because in gonna get one
oneword4letters 1 month ago
@oneword4letters dont get one dude i just got a 2000 bored out to 240 and after a few rides already have problems, get a ltz, raptor, honda ex, or kfx, some kind of four stroke, things last for years
SmellyH03 1 month ago
mine had the same noise and it was bored over .40 and i had it for a year and i rode it every day and never had a problem with it
codyraab1 2 months ago
if you ask me all blasters make that noise
coolvidssubscribe 2 months ago
maybe because you lost a anti-vibration rubber ring.. or the bad oil
leonardgermain 2 months ago
sounds like piston slap.
Gtingboy 2 months ago
it's not knock it's just how it sunds 2 stokes make alot of wierd noises like that so u dont half to worrie till it's something really off i have a 98 blaster and im one bore under the big bore and mine makes the same noise when it's cold and if it has the stock pipe it makes that noise
dabarr100 4 months ago
same noise with my bike..
but mine got scratches intake port on piston
change new piston and rings
it quite for a few week,than it start making that noise again..
did you found the problem?
amadzack666 5 months ago
ya bro you engine is fucked, the crank shaft bearings are gone, your better off buying a used or new engine instead of getting it rebuilt
fcanane1 6 months ago
@fcanane1 It actually turned out to be piston slap, even though my 240 kit was brand new it wore that quickly. The bottom end was fine and it runs great now that the stock top end is back on.
horseye20008 6 months ago
@horseye20008 oh lol, i used to have a blaster and the crankshaft bearing went so i slaped the top of the cylinder head. but i have never heard of a 240 making the piston slap. the only way you can get piston slap is if your bearing have slop in them, but i could be wrong. atleast your blaster is running perfect and not mine lol
fcanane1 6 months ago
sounds more like piston slap to memy 240 big bore does the same thing so does my wifes stock blasty
GKDSoldier 6 months ago
mine doesw same thing if not louder man and whenever im like ruff on it it makes a loud squeeking noise
zachd242 1 year ago
i have a werid knock but its only when i kick mine or turn off the engine
dalton456 1 year ago
id say its top end maybe a bad wrist pin. if it was a bearing it would be a high pitched squeal
dr00andrew 1 year ago
So what was it?
scotchaaron 1 year ago
@scotchaaron It was excessive play in the lower rod bearing.
horseye20008 1 year ago
@horseye20008 - was there up/down play or side to side play? I just rebuilt the top end of my yamaha rt 180 and it sounded exactly like that before and after too. I couldn't detect and up/down play on the rod at all, but there was some side to side clearance. Did you replace the rod and lower bearing? Perform any work on the crank? Thanks.
chadr00 1 year ago
@chadr00 well i haven't got into it too deep yet but the rod seems to have quite a bit of up and down play. I'm going to put a new crank in it so hopefully that fixes it.
horseye20008 1 year ago
well make sure that you check you jug if you say that it is new bacause it might just need tightened down again
253cjm 1 year ago
sounds like your jug is lose or you crank might be going bad thats what mines sounded like!! let me know!!
253cjm 1 year ago
@253cjm I just got the engine out, haven't torn it down yet. I have a feeling it's the big rod end bearing because the top end is new but the bottom is all original.
horseye20008 1 year ago