Blaster 2000 - Runs good Won’t idle

Ahmed Hegazy

Member
Mar 27, 2020
9
5
35
34
Dears,

i own blaster 200, i have on T5 pipe and installed jet kit comes with it and adjusted the needle and installed the jets as per the instructions came with the pipe, iridium plug.

i have V-Force 4 with spacers, K&N filter and it was running very good.

Did not take it for a long run but after first time is started spitting black oil from exhaust chamber.

and the problem now i took for along ride it won’t idle any more if i give gas it keeps running but when i remove my thumb from the throttle it shutdown, it was running great don’t know what to do i tried to adjust idle screw on top of TROS and it does not do anything
 

Attachments

  • 1148E052-A9EF-4D81-87AF-152105E7A2B9.jpeg
    1148E052-A9EF-4D81-87AF-152105E7A2B9.jpeg
    405.1 KB · Views: 164
Are you running stock carb? If so what # jets. Did you install. Stock pilot is the one you need in stock carb. Needle in middle position on stock carbs works with most pipes. What. Ratio are you running. Black. Spoog out of pipe sounds like your running rich. Check color of plug. Probably black/wet.
 
  • Like
Reactions: Awk08
Are you running stock carb? If so what # jets. Did you install. Stock pilot is the one you need in stock carb. Needle in middle position on stock carbs works with most pipes. What. Ratio are you running. Black. Spoog out of pipe sounds like your running rich. Check color of plug. Probably black/wet.
Yes Stock carb jet 300 came with the pipe needle is in 3rd position it was as per the instructions, i don’t know what to do if i am running rich ?, but at the moment the idle problem is what driving me crazy it was running perfectly with no issues
 
  • Like
Reactions: Awk08
I had a Toomey pipe on my sons stock blaster, it liked the 300 main jet, but wanted the needle clip in the stock middle position
that was at 1800' elevation, lower elevations may benefit from dropping the needle, mine did not.

as for the idle, it has nothing to do with the needle or main jet,
you need to adjust the airscrew for highest idle, as described here .....
https://www.blasterforum.com/threads/adjusting-your-airscrew-pilot-jet.51060/

I edited out the actual tuning part .....

to adjust the airscrew....start at 1.5 turns out from lightly tight. (lefty loosey/righty tighty)
get the bike warmed up, revving it if needed to keep it running.
turn your idle up slightly to help it stay running and overcome the incorrect settings of the adjustment process.
(return idle screw to acceptable idle RPM after done tuning)

you are looking for the airscrew setting that acheives the highest idle.

from the 1.5 turns out, slowly start turning the screw in 1/2 turns at a time,
allowing 15-20 seconds between turns for the engine to "catch up" to each new fuel/air setting. <<< VERY IMPORTANT
repeat in the other direction from 1.5 turns out to 2.5 to 3+ turns out
find the turns in or out that the engine idles the highest, double check it, kill the engine and turn the screw in completely counting the turns as you do, write it down and return it to the newly found high idle setting.
if this # of turns is between 1/2 and 2-1/2 turns out, you are golden.

now you can do 1/8th turns each direction until it revs cleanly past 1/2 throttle, this can also be done while riding it to achieve good throttle response or daily to accommodate changing conditions

*********************************************************************************************************

If the highest idle setting is below 1/2 turn out, you need a richer/larger pilot jet.
If highest idle setting is above 2-1/2 turns out, you need a smaller/leaner pilot jet.
If the airscrew settings have no effect on the idle you need to jump a couple sizes either direction until you find one that the airscrew setting will have an effect on using the known jet sizes for various carbs as a guide


airscrew on stock carb .............
16hu2au.jpg
 
I had a Toomey pipe on my sons stock blaster, it liked the 300 main jet, but wanted the needle clip in the stock middle position
that was at 1800' elevation, lower elevations may benefit from dropping the needle, mine did not.

as for the idle, it has nothing to do with the needle or main jet,
you need to adjust the airscrew for highest idle, as described here .....
https://www.blasterforum.com/threads/adjusting-your-airscrew-pilot-jet.51060/

I edited out the actual tuning part .....

to adjust the airscrew....start at 1.5 turns out from lightly tight. (lefty loosey/righty tighty)
get the bike warmed up, revving it if needed to keep it running.
turn your idle up slightly to help it stay running and overcome the incorrect settings of the adjustment process.
(return idle screw to acceptable idle RPM after done tuning)

you are looking for the airscrew setting that acheives the highest idle.

from the 1.5 turns out, slowly start turning the screw in 1/2 turns at a time,
allowing 15-20 seconds between turns for the engine to "catch up" to each new fuel/air setting. <<< VERY IMPORTANT
repeat in the other direction from 1.5 turns out to 2.5 to 3+ turns out
find the turns in or out that the engine idles the highest, double check it, kill the engine and turn the screw in completely counting the turns as you do, write it down and return it to the newly found high idle setting.
if this # of turns is between 1/2 and 2-1/2 turns out, you are golden.

now you can do 1/8th turns each direction until it revs cleanly past 1/2 throttle, this can also be done while riding it to achieve good throttle response or daily to accommodate changing conditions

*********************************************************************************************************

If the highest idle setting is below 1/2 turn out, you need a richer/larger pilot jet.
If highest idle setting is above 2-1/2 turns out, you need a smaller/leaner pilot jet.
If the airscrew settings have no effect on the idle you need to jump a couple sizes either direction until you find one that the airscrew setting will have an effect on using the known jet sizes for various carbs as a guide


airscrew on stock carb .............
16hu2au.jpg
I have followed the instructions, the bogger won’t idle, maybe it’s because it’s spiting black oil out of the exhaust chamber do i need to clean something or is it electrical but it runs when i throttle
 
  • Like
Reactions: Awk08
So what airscrew turns out did you end up with to achieve highest idle ?
did you return the needle clip to the middle slot ?
it will take some time for the built up oil in the pipe to clear itself
have you checked the reeds for cracks/chips/broken petals ?
have you tried turning the idle screw to increase idle rpm's ?
 
So what airscrew turns out did you end up with to achieve highest idle ?
did you return the needle clip to the middle slot ?
it will take some time for the built up oil in the pipe to clear itself
have you checked the reeds for cracks/chips/broken petals ?
have you tried turning the idle screw to increase idle rpm's ?
Okay so i took everything apart cleaned the Carb adjusted the needle on middle position, reed valves was covered in oil cleaned that as well, and it ran perfectly got fixed the idle issue much thanks but now am having troubles to follow ur guide can’t we FaceTime easier i live in Egypt bit hard to find support for 2 stroke lol
 
Okay so i took everything apart cleaned the Carb adjusted the needle on middle position, reed valves was covered in oil cleaned that as well, and it ran perfectly got fixed the idle issue much thanks but now am having troubles to follow ur guide can’t we FaceTime easier i live in Egypt bit hard to find support for 2 stroke lol
Glad you got it going. What part of guide are you having a problem with?
 
Glad you got it going. What part of guide are you having a problem with?
I don’t quite get highest idle thing, on the T5 instructions it says turn the airscrew 3/4 i did that and it ran fine, but i want to achieve the best tune more explanation would do me
Better thanks.
 
I don’t quite get highest idle thing, on the T5 instructions it says turn the airscrew 3/4 i did that and it ran fine, but i want to achieve the best tune more explanation would do me
Better thanks.

really, if it starts easy, idles good, and doesn't bog when you rev to 1/2 throttle, let it alone.
glad you got it figured out

for tuning....
turn the airscrew 1/2 turn, wait for 20-30 seconds time, listen to the engine RPM's increase or decrease.
turn it another 1/2 turn and wait and listen for the engine RPM's to change again.
you want to find the turns out of the airscrew, which produces the highest RPM.
then set your desired idle rpm with the idle screw
 
I don’t quite get highest idle thing, on the T5 instructions it says turn the airscrew 3/4 i did that and it ran fine, but i want to achieve the best tune more explanation would do me
Better thanks.
Warm the engine up first. If it runs good with air screw at 3/4 turn out .then start there.start at 1/4 turn at a time. And give it 15 seconds before you adjust. Again to let engine catchup to new adjustment.till you get highest idle. When you get it set then set your idle with idle screw. It's air cooled so don't let motor get to hot
 
really, if it starts easy, idles good, and doesn't bog when you rev to 1/2 throttle, let it alone.
glad you got it figured out

for tuning....
turn the airscrew 1/2 turn, wait for 20-30 seconds time, listen to the engine RPM's increase or decrease.
turn it another 1/2 turn and wait and listen for the engine RPM's to change again.
you want to find the turns out of the airscrew, which produces the highest RPM.
then set your desired idle rpm with the idle screw
I agree with awk
 
really, if it starts easy, idles good, and doesn't bog when you rev to 1/2 throttle, let it alone.
glad you got it figured out

for tuning....
turn the airscrew 1/2 turn, wait for 20-30 seconds time, listen to the engine RPM's increase or decrease.
turn it another 1/2 turn and wait and listen for the engine RPM's to change again.
you want to find the turns out of the airscrew, which produces the highest RPM.
then set your desired idle rpm with the idle screw
Much appreciate your help Awk, especially on the black oil spitting thing you were right i had to let the bike some time to start cleaning it self, i’ll follow this now and let u know the updates again much thanks that was very helpful
 
  • Like
Reactions: Awk08
Warm the engine up first. If it runs good with air screw at 3/4 turn out .then start there.start at 1/4 turn at a time. And give it 15 seconds before you adjust. Again to let engine catchup to new adjustment.till you get highest idle. When you get it set then set your idle with idle screw. It's air cooled so don't let motor get to hot
Sure thing will do thanks bro :))
 
  • Like
Reactions: Awk08 and Slydog
Gents, i have tuned the bike as per the instructions kept adjusting the air screw till the highest idle it ended up one turn, the thing is after a while of riding the bike it start to spit black oil from the exhaust chamber again, it’s really confusing me, any thoughts
 
Gents, i have tuned the bike as per the instructions kept adjusting the air screw till the highest idle it ended up one turn, the thing is after a while of riding the bike it start to spit black oil from the exhaust chamber again, it’s really confusing me, any thoughts
Should be fine on the air screw the. How are you riding it? Putting around? Are you running it full throttle ? Did you do plug chops to confirm main jetting?
 
If putting around it can load up.could be the oil also.if your not running to rich on jetting