leak down test result

[gsustaitav19822]

So i did a leak test on my blaster and in the first min it lost 2lbs of pressure but it hold 5 psi for 20 min .
The resson i leak test is cuz when i start it and the blaster is cold it starts on hi revs and i have to pull the choke to get her down. And afther that I start to ride it afther it warns for a lil and it boggs a little but afther is hot it runs like a champ what could it be

 

[speedyslyder]

?
i dont know what else you have tried can you explain?

list mods done to it.
air screw at 1.5 turns out from fully seated
idle is under the seat on stock carb.
dirty pilot jet,dirty carb
if you have it in that storage place in your profile pic then it could be your pilot jet,soak it in carb cleaner

 

[gsustaitav19822]

?
i dont know what else you have tried can you explain?

list mods done to it.
air screw at 1.5 turns out from fully seated
idle is under the seat on stock carb.
dirty pilot jet,dirty carb
if you have it in that storage place in your profile pic then it could be your pilot jet,soak it in carb cleaner

Full pro circuit exhaust.
320 main havent re jet for summer.
Air box lid off
32-1 pre mix yamalube 2r
Just cleaned the carb.
New boyessen dual stage Reed put in before leak test.

 

[gsustaitav19822]

?
i dont know what else you have tried can you explain?

list mods done to it.
air screw at 1.5 turns out from fully seated
idle is under the seat on stock carb.
dirty pilot jet,dirty carb
if you have it in that storage place in your profile pic then it could be your pilot jet,soak it in carb cleaner

And actualy the pic from profile is from where i work its a Packing house i ride the blaster every day at least 10 min

 

[Awk08]

did you spray the engine down with soapy water to pinpoint the source of the leak (if any)
if it held 5 lbs for 20 minutes....I'd run it.

I say the source of your problem is elsewhere, like dirty carb, clogged pilot jet,
bad float level, poor fuel flow to carb, airscrew adjustment, ect.

most of those are pinned threads at the top of the carb section:
http://www.blasterforum.com/forums/carburetor.138/

 

[blasterkid1998]

a 320 main seems alittle large.and how do you like the pro circuit exhaust? i dont know much about them.

 

[98blaster]

That 320 seems super overkill, id run a 280 or 270 an see where its at witha plug chop. Clip in middle slot

 

[blasterkid1998]

That 320 seems super overkill, id run a 280 or 270 an see where its at witha plug chop. Clip in middle slot

at the moment i have a 280 in my somewhat stock blaster with fmf exhaust.a 320 is overkill unless its ported

 

[98blaster]

I have a 280 in my built engine, aggressive trail port, modded head, lrd pipe an trenga silencer, lightened flywheel, vforce 3 reeds, no lid an no oil injection, it runs perfect, touch rich. My buddy has a full flotek built ported stroker engine, an its on a 300, fmf pipe no lid, no injection, also just a tad rich. At 1k sea level

 

[blasterkid1998]

a 280? that seems small for a piped and ported blaster.im running a 330 with the mods in my sig.

 

[98blaster]

Its perfect, everyone on here seems to jet everything way to rich, from my experience these engines dont need huge main jets.

 

[blasterkid1998]

i plug choped yesterday with a 320 and it was a tad lean so i bumped it up to a 330 main.and IMO its better to run safe on the rich side.

 

[98blaster]

Mine is safe on the rich side

 

[gsustaitav19822]

a 320 main seems alittle large.and how do you like the pro circuit exhaust? i dont know much about them.

I realy like my pro circuit good akl oround pipe low to mid power

 

[speedyslyder]

having allllll of the parts in your carb cant hurt either,do you got the ring? plastic piece on main jet #12

 

[gsustaitav19822]

having allllll of the parts in your carb cant hurt either,do you got the ring? plastic piece on main jet #12

View attachment 11047

Yes everything is there ill take a better look at the pilot jet on Monday cuz the bike i got it at work thanks alot every one for your help.

 

[speedyslyder]

ok hold it up to a light above your head you should be able to see through it
It is wise to use your stock reed stoppers on those dual stage reeds not the bar it comes with at all but its up to you