|
|
|
|||||||
| 150cc GY6 and Under Engine Tech GY6 and Smaller Technical Discussion Forum |
|
|
Thread Tools |
|
#1
05-31-2016, 04:25 AM
|
||||
|
||||
Crossfire 150 hiccups off idle.
Every time i punch it off idle it "hiccups" Will also do it if i punch while just cruising at a steady speed. Best way to descibe it is it feels like i hit the kill switch for a split second. So....punch throttle...hiccup....haul ass....smooth as butter till i let off and punch it again.
Checked carb...new intake just incase...fuel flow is good...im kinda stumped. It did this last year and i cant for the life of me remember what i did to fix it. Changed coil and it stopped for a couple of hours and started doing it again. |
|
#2
05-31-2016, 10:12 PM
|
||||
|
||||
|
What kind of carb? (although you said it went away after a new coil?)
What coils are you using? Cheap ones don't last long. (buy a quality coil)
__________________
My Yerban assault vehicle: 2.2mm stroker crank, 62mm Nikasil cyl, Taida large vavle head, American made valve springs, ported intake manifold, TM 28mm carb, stock CDI, Bando coil, TK exhaust, stock CVT except for the 14g sliders, 13/40 internal gears, 16T drive, 31T axle sprocket, 22" rear tires, and ONE BIG POTATO CANNON mounted on top.......... |
|
#3
06-01-2016, 12:24 AM
|
||||
|
||||
|
Its a 26mm cv (only one ive ever seen) been on for close to a year no problems....cant remember if i had this carb on last time it happened or if it was a 24mm. Coil wise ebay one....Ill try another coil tomorrow.
|
|
#4
06-01-2016, 09:35 PM
|
||||
|
||||
|
Ebay cheapy coils are problematic. Might be the problem,
CV carbs use the elec choke, right? Make sure yours isn't stuck.
__________________
My Yerban assault vehicle: 2.2mm stroker crank, 62mm Nikasil cyl, Taida large vavle head, American made valve springs, ported intake manifold, TM 28mm carb, stock CDI, Bando coil, TK exhaust, stock CVT except for the 14g sliders, 13/40 internal gears, 16T drive, 31T axle sprocket, 22" rear tires, and ONE BIG POTATO CANNON mounted on top.......... |
|
#5
06-08-2016, 08:51 PM
|
||||
|
||||
|
Choke is blocked off. have tried coils off other running buggys and a couple of different carbs off good running buggys......Im at a loss.
__________________
Buggy Dealer Crossfire 250r IRS (400cc swap in progress) Crossfire 250r (SYM 250) HH250SS..RIP (IRS donor for the crossfire) HammerHead 150 Gs Moon buggy 150 Many other random parts buggys (still never have what im needing tho :/ ) |
|
#6
06-08-2016, 09:16 PM
|
||||
|
||||
|
Different carbs and coils? Same result?
But it disappeared for a while after you replaced a coil before?
__________________
My Yerban assault vehicle: 2.2mm stroker crank, 62mm Nikasil cyl, Taida large vavle head, American made valve springs, ported intake manifold, TM 28mm carb, stock CDI, Bando coil, TK exhaust, stock CVT except for the 14g sliders, 13/40 internal gears, 16T drive, 31T axle sprocket, 22" rear tires, and ONE BIG POTATO CANNON mounted on top.......... |
|
#7
06-09-2016, 07:29 AM
|
||||
|
||||
|
Yep same results....and yep maybe it was just a coincident that it didn't do it after i changed coils the first time....its getting worse now also....maybe its just a bad harness...anywhere to buy the engine harness other than BDs 80 dollar hand made one?
__________________
Buggy Dealer Crossfire 250r IRS (400cc swap in progress) Crossfire 250r (SYM 250) HH250SS..RIP (IRS donor for the crossfire) HammerHead 150 Gs Moon buggy 150 Many other random parts buggys (still never have what im needing tho :/ ) |
|
#8
06-09-2016, 10:29 PM
|
||||
|
||||
|
Not sure on the harness.
Any chance of you getting a video of the problem? Getting worse is actually good. At least it makes it easier to identify as opposed to sporadic problems.
__________________
My Yerban assault vehicle: 2.2mm stroker crank, 62mm Nikasil cyl, Taida large vavle head, American made valve springs, ported intake manifold, TM 28mm carb, stock CDI, Bando coil, TK exhaust, stock CVT except for the 14g sliders, 13/40 internal gears, 16T drive, 31T axle sprocket, 22" rear tires, and ONE BIG POTATO CANNON mounted on top.......... |
|
#9
06-10-2016, 05:10 PM
|
||||
|
||||
|
i got a video but no clue how to upload it unless i link it from facebook
__________________
Buggy Dealer Crossfire 250r IRS (400cc swap in progress) Crossfire 250r (SYM 250) HH250SS..RIP (IRS donor for the crossfire) HammerHead 150 Gs Moon buggy 150 Many other random parts buggys (still never have what im needing tho :/ ) |
|
#10
06-10-2016, 10:02 PM
|
||||
|
||||
|
do you use rollers or sliders in your variator? have you checked them lately ? maybe they could be warn ?
__________________
Hammer head Single seater know as herbie under construction Aluminum fuel tank, aluminum wheels, custom fuel/cargo rack, entire rewire, trail tech vapor, ported big valve head, a12camshaft, 12 gram sliders, straight intake, kirkey wide seat, front end extension. 4 point harness, welded cage. Hammerhead exhaust. Blade Single Seater Restore welded cage, engine build, new wiring harness/electric box, spun aluminum fuel tank. |
|
#11
06-10-2016, 10:38 PM
|
||||
|
||||
|
Sliders and its been a few months since ive checked them. But i did have the carb off last night and the intake valve was open and i could see that the exaust valve was like a brick red color.....Could a burnt valve cause this?
__________________
Buggy Dealer Crossfire 250r IRS (400cc swap in progress) Crossfire 250r (SYM 250) HH250SS..RIP (IRS donor for the crossfire) HammerHead 150 Gs Moon buggy 150 Many other random parts buggys (still never have what im needing tho :/ ) |
|
#12
06-10-2016, 11:46 PM
|
||||
|
||||
|
Would most likely cause poor compression if it was burnt.
What is your compression?
__________________
My Yerban assault vehicle: 2.2mm stroker crank, 62mm Nikasil cyl, Taida large vavle head, American made valve springs, ported intake manifold, TM 28mm carb, stock CDI, Bando coil, TK exhaust, stock CVT except for the 14g sliders, 13/40 internal gears, 16T drive, 31T axle sprocket, 22" rear tires, and ONE BIG POTATO CANNON mounted on top.......... |
|
#13
06-12-2016, 03:42 AM
|
||||
|
||||
|
195psi
__________________
Buggy Dealer Crossfire 250r IRS (400cc swap in progress) Crossfire 250r (SYM 250) HH250SS..RIP (IRS donor for the crossfire) HammerHead 150 Gs Moon buggy 150 Many other random parts buggys (still never have what im needing tho :/ ) |
|
#14
06-12-2016, 10:43 AM
|
||||
|
||||
|
Don't think your valve is burnt with that hi of compression.
Have you checked your valve clearances? Have you checked your valve/camshaft timing? Have you checked your cam chain tension? Checking your sliders is probably a good idea too. (may have had one flop over) Maybe check the clutch, bell, and belt. You might be slipping Lastly, can you try a different CDI just for the Hell of it? It almost sounds like a timing issue. (which is why I want you to look at valve timing)
__________________
My Yerban assault vehicle: 2.2mm stroker crank, 62mm Nikasil cyl, Taida large vavle head, American made valve springs, ported intake manifold, TM 28mm carb, stock CDI, Bando coil, TK exhaust, stock CVT except for the 14g sliders, 13/40 internal gears, 16T drive, 31T axle sprocket, 22" rear tires, and ONE BIG POTATO CANNON mounted on top.......... |
|
#15
06-12-2016, 04:19 PM
|
||||
|
||||
|
Have tried a couple different cdis. Valves are adjusted. Ill check timing etc. clutch bell and belt are good but ill check sliders.
__________________
Buggy Dealer Crossfire 250r IRS (400cc swap in progress) Crossfire 250r (SYM 250) HH250SS..RIP (IRS donor for the crossfire) HammerHead 150 Gs Moon buggy 150 Many other random parts buggys (still never have what im needing tho :/ ) |
|
|
