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07-18-2010, 02:03 PM
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#1 (permalink)
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Junior Member
Member #4141
Join Date: Jul 2010
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Posts: 19
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300ex only half rev..???
i have a 1998 honda 300ex and just put in new rings. has a big bore kit in it. timing is right on and no odd noise when idle. fires right up and sounds great again but for some reason it will only rev half throttle and then revs out. all power is gone at that point. need some help i have tried going one tooth back on the timing and goin on tooth ahead and does not change,.any if would be great.
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07-18-2010, 02:22 PM
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#2 (permalink)
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Senior Member
Member #948
Join Date: Oct 2009
Location: Wherever my Foreman can take me!
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Posts: 6,468
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Welcome to the forums. Did it just start this after installing the new rings and was it already running right with the big bore kit before?
__________________
Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!
Everyone's entitled to their own opinion, even though mine is right and yours is wrong.
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07-18-2010, 02:29 PM
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#3 (permalink)
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Super Moderator
Member #417
Join Date: Jun 2009
Location: East coast North Carolina
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Posts: 5,423
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Agree^^^^^ also the valve adjustment may be off maybe too tight? check your choke lever too
__________________
MOOSE
1991 TRX 250X
12:1 wiesco piston @ 60 over
stage 1 cam,
Vesra connecting rod
High performance coil
jet kit, 400EX carb, K&N filter,
FMF power Core 4 full exhaust,Tusk nerfbars.
Coming soon Ported and polished headECT. ECT.
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07-18-2010, 03:23 PM
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#4 (permalink)
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Junior Member
Member #4141
Join Date: Jul 2010
( 0)
Posts: 19
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the big bore kit was already in there when i got it and i have checked the choke if the choke is at half or full still does it. i have started going threw the wires. and have not found any losose or broke yet.
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07-18-2010, 03:24 PM
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#5 (permalink)
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Junior Member
Member #4141
Join Date: Jul 2010
( 0)
Posts: 19
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o and the valves are at stock.
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07-18-2010, 04:13 PM
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#6 (permalink)
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Senior Member
Member #3187
Join Date: May 2010
Location: ma
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Posts: 183
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Has the carb been cleaned?
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07-18-2010, 04:15 PM
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#7 (permalink)
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Super Moderator
Member #417
Join Date: Jun 2009
Location: East coast North Carolina
( 0)
Posts: 5,423
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yeah clean the carb especially the jets and their seats
__________________
MOOSE
1991 TRX 250X
12:1 wiesco piston @ 60 over
stage 1 cam,
Vesra connecting rod
High performance coil
jet kit, 400EX carb, K&N filter,
FMF power Core 4 full exhaust,Tusk nerfbars.
Coming soon Ported and polished headECT. ECT.
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07-18-2010, 04:16 PM
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#8 (permalink)
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Senior Member
Member #948
Join Date: Oct 2009
Location: Wherever my Foreman can take me!
( 0)
Posts: 6,468
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X3 on cleaning the carb. Carb cleaning is a good first step.
__________________
Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!
Everyone's entitled to their own opinion, even though mine is right and yours is wrong.
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07-18-2010, 04:21 PM
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#9 (permalink)
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Junior Member
Member #4141
Join Date: Jul 2010
( 0)
Posts: 19
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the carb was not touched when the rings were put in only thing was i pulled the old piston rings off and put on new ones. sounds like the rev limiter is peging out when its only at half throttle. i will clean the carbs though. thank you everyone and any more info will help.
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07-18-2010, 04:22 PM
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#10 (permalink)
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Super Moderator
Member #417
Join Date: Jun 2009
Location: East coast North Carolina
( 0)
Posts: 5,423
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When you set the cam in how did you install it and what did you adjust the valves to?
__________________
MOOSE
1991 TRX 250X
12:1 wiesco piston @ 60 over
stage 1 cam,
Vesra connecting rod
High performance coil
jet kit, 400EX carb, K&N filter,
FMF power Core 4 full exhaust,Tusk nerfbars.
Coming soon Ported and polished headECT. ECT.
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1998 honda 300 4 wheeler carburator, atv only half throttle, 300 ex rev -limiter problems, 98 honda 300ex, honda 300ex rev limiter, 98 300 ex cam, 1998 honda atv choke adjustment
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