Polaris Pro Riders
Sign up Calendar Latest Topics
 
 
 


Reply
  Author   Comment  
yellow93coupe

Registered:
Posts: 66
Reply with quote  #1 
Where would I start adjusting for a part throttle stumble when engine is hot. My idle and full throttle response is great. Carb is a 43mm done by thumper and it has the Honda needle in it set at the 4th lowest position. Bike runs great for about ten minutes then starts stumbling while just cruising around. It will clear up if given over 1/4 throttle. I noticed the o-ring mod was done away with and is now held by safety wire. Which makes me wonder if it's not throwing to much fuel to it.
LEOGM5150

Avatar / Picture

SITE OWNER
Registered:
Posts: 15,429
Reply with quote  #2 
i would try going back to the o-ring. the wire is known to blow out the pumper diaphram. the honda needle is very rich i might lift the clip on the needle one notch up to the 3rd.
__________________
FROM: POWELL WYOMING USA

MY GREATEST FEAR IS THAT WHEN I DIE MY WIFE WILL SELL MY TOYS FOR WHAT I TOLD HER I HAVE INTO THEM...

2014 POLARIS RZR 4 900 EPS
2012 POLARIS RZR 4 900 XP
2008 POLARIS RZR 800
2008 POLARIS OUTLAW 525S LE
2007 POLARIS OUTLAW 525 IRS
2000 400 RCR TWO STROKE SCRAMBLER
2001 400 TWO STROKE SCRAMBLER
2005 SKI DOO 1000 TWO STROKE SAND SLED
Team Bricktucky

Avatar / Picture

Registered:
Posts: 2,071
Reply with quote  #3 
ac pump timing.. i still have my fcr's wired/zip tied but i adjusted the ac pump linkage screw (its the screw where you do the o-ring mod)and that help with the spary timing on the ac pump. it took away all back firing and lowend stumbles. i use to use the o-ring mod but the O-rings wear out and break, so used a small zip tie and bail wire on another atv..  id mess with the ac pump timing(squirt timing on the ac pump)  i haven't had any issues with the diaphragm... however before i ever did any o-ring mod or wire mod , i did have a blown out diaphragm(stock, factory)that needed to be replaced. the diaphragm was cracked in the middle where the rubber meets the center stud on the diaphragm.
Previous Topic | Next Topic
Print
Reply

Quick Navigation:

Easily create a Forum Website with Website Toolbox.