240 bbk problems need expert help

[Budget_Blaster]

Ok i broke it in all nice like took it out and was out running it pretty easy snd it just wont hit the power band its fine at idle and at off idle but the thing just wont rev out.

Ok heres what ive done using vitos kit ive tried every jet from 340-280 no luck ive tried every setting on the jet needle adjusted a/f all with no luck.

So i resorted to calling vitos and spoke to a paul (very nice guy) and i did all these adjustments per his instructions on the phone still no luck.idk wtf is up but its annoying.

Can those of you running this kit lend any help or maybe ken oconnor awk someone im stuck and dont know what to do.

Im waiting on my dynoport exhaust so im still running the fmf fatty.

Paul at vitos said i should see a small carbon mark the size of a dime if it was spot on its like new and clean on the crown no carbon.

I did two plug chops and they were wet on the plug so it was hard to tell but even with a 280 and the needle on very top clip it just bogs and pops.im stumped please help!

 

[brandoz28]

if the plug is wet, guess what, its pig rich.

 

[blasterfreek30]

u have an airbox lid on it?

 

[02yamaturd]

I had no airbox lid, bills pipe, boyeson reeds, uni filter and stock carb...I was running a 340 main and it was spot on....you still have tors on??? And what size carb you running???

 

[Budget_Blaster]

No lid.

No tors

And its a stock carb ive not located the 35 mm im looking for.

Idk wtf to do now ive leaned it down as far as i can and still it wont rev out.it will however rev much higher in neutral but under a load it just wont do it.

Im baffled ive been into engines of all types for 15+ years and im stumped idk what to try now.i hope one of you has the answer.im open to suggestiions.

 

[02yamaturd]

What's the float set at????

 

[Budget_Blaster]

Stock setting whatever was in the manual.it rsn like a raped ape before the 240.

All i changed was the head jug and jetting.

 

[2smoker85]

the first problem is ur carb it is restricting the hell out of it,i hope ur running 110 mix with premium, i do half and half and if the plug is soaked u got that thing rich as hell, but even when i was running rich as hell it still ran like a bat out of hell. does it idle well? have u checked ur reeds, these are the simple things u need to check, then ur float height, do a plug chop the best u can and look at the top of it and see what color it is, a brownish color is good

 

[Awk08]

did you use the green vito's base gasket ???? < leakdown test definately required,
seal the intake good, clean the carb properly ???? filter clean and oiled properly ???
i'd compression check it too, is the piston in the right direction ???
bogging under load is sometimes an electrical issue, check the ground at the coil, i'd also look real hard at the plug/wire and boot, maybe even ohm meter it while bending it around looking for an internal break in the wire, and check all the other electrical connections you may have disconnected for the install
reeds good ??? flywheel woodruff key slipped/broke ???
so many things it could be, start eliminating them one at a time

 

[hudack]

the first problem is ur carb it is restricting the hell out of it,i hope ur running 110 mix with premium, i do half and half and if the plug is soaked u got that thing rich as hell, but even when i was running rich as hell it still ran like a bat out of hell. does it idle well? have u checked ur reeds, these are the simple things u need to check, then ur float height, do a plug chop the best u can and look at the top of it and see what color it is, a brownish color is good

you can run a stock carb with a vitos its not gana cause this he can run pump gas with a vitos realy i dont think you should run race gas unless its needed i mean other wise your realy just wasting money.
if the plugs wet it means its rich. cut the threads on the plug to get a better reading on it did you make sure the reeds had no gaps or cracks before you put them in. you should leakdown test it also and check thw wires like awk said

 

[2smoker85]

ok keep running a stock carb with a 240, u will never get the performance u want. obviously u know nothing about a bigger motor on a bike. put a stock carb and a 35mm on one and see which ones runs better, if u dont know what ur talking about dont talk... there is more than one thing that can cause this. but take the advice over a 16 yr old and someone who has built more than one blaster... and premium gas in mine was causing detonation, so i run 110 and premium mix

 

[Budget_Blaster]

The reeds and boot are new.

Ill have to ohm out the wire.

The base gasket is the vitos but i used copper gasket adhesive on it and its been torqued correctly.

What are the signs that a base gasket hes let go?

Its really weird it seemed like at first when riding it seemed ok not spit on but just gradually petered out.compression is at 170 i just checked it before dinner.

 

[hudack]

ok keep running a stock carb with a 240, u will never get the performance u want. the reason u run race gas is because of detonation. obviously u know nothing about a bigger motor on a bike. put a stock carb and a 35mm on one and see which ones runs better, if u dont know what ur talking about dont talk... there is more than one thing that can cause this. but take the advice over a 16 yr old and someone who has built more than one blaster...

i didnt say a stock carb would give it more power than a bigger one. i said it wouldnt cause this problem......i know the reason you run race gas with a stock vitos cylinder you dont need it so whats the point in runign it. i know plenty about a bigger motor on a bike i know what im talking about not on everything but somethings......dont act like such a know it all arnt you the one that dumped a cap of carb cleaner in the spark plug hole to see if it would start. i was trying to help him like you were but you had to be a dick head about it.

 

[hudack]

The reeds and boot are new.

Ill have to ohm out the wire.

The base gasket is the vitos but i used copper gasket adhesive on it and its been torqued correctly.

What are the signs that a base gasket hes let go?

Its really weird it seemed like at first when riding it seemed ok not spit on but just gradually petered out.compression is at 170 i just checked it before dinner.

oil around the base of the cylinder do a leak down test and you will know for sure

 

[2smoker85]

i didnt say a stock carb would give it more power than a bigger one. i said it wouldnt cause this problem......i know the reason you run race gas with a stock vitos cylinder you dont need it so whats the point in runign it. i know plenty about a bigger motor on a bike i know what im talking about not on everything but somethings......dont act like such a know it all arnt you the one that dumped a cap of carb cleaner in the spark plug hole to see if it would start. i was trying to help him like you were but you had to be a dick head about it.

for one i wasnt being a dick and whats ur point on the carb cleaner in the motor? i know what im doing, motor is still good holds 140 psi and ran like a raped ape, i wasnt being a dick or a know it all, and a stock carb is going to restrict the motor which will cause it not to reach its potential, common motor sense. im not going to get into an internet argument with a 16 yr old over things i have been doing for quite awhile.

 

[Budget_Blaster]

Its bone dry you can literally eat off this engine.there was only 10 hours on the old setup and 2 on this 240.

The engine doesnt run like ass with gasket blown?

Idles perfect doesnt load up and will sit there idling all day if i chose to.its just the upper rpms is when it gets funky.

 

[brandoz28]

could we not make this a pissing match and continue to try to help him out with his issue? sure having the stock carb isn't going to yield optimal results, but it should still run with it on there.


since it ran well before you tore it down for the bbk, you need to look at everything you touched since then

 

[hudack]

for one i wasnt being a dick and whats ur point on the carb cleaner in the motor? i know what im doing, motor is still good holds 140 psi and ran like a raped ape, i wasnt being a dick or a know it all, and a stock carb is going to restrict the motor which will cause it not to reach its potential, common motor sense. im not going to get into an internet argument with a 16 yr old over things i have been doing for quite awhile.

sounded like it to me telling me i didnt know anything..... dumping carb cleaner into the motor would be like runing without any oil a stcok carb isnt going to let it run its fullest but it wouldnt cause this there are plenty of people who run stock carbs with a vitos

 

[2smoker85]

well to clear the air i did it to test a theory and i was right, i oiled the cylinder before i did it and only started it long enough to see if it would start. the stock carb is garbage and will not get the air the motor needs to run to its potential. i work on diesel engines for a living, so i do know a few things

 

[Budget_Blaster]

Theres not much to a blaster and ive went over my work with a fine tooth comb.

How the hell can gi be rich with a 280? The old motor loved the 280 bigger motor=bigger fuel needs it dont make sense.

I dont think its a mechanical issue it feels like fuel deluvery of some sort.i just cant pin point it yet.