Motorcycle Questions? Ask a Mechanic.
ok the revs .
diag. on carb
1. pull choke out do revs seems to lower.
2. any popback through carb during start up
diag on runability
1. when was last service mile wise
2. any changes addons ect
3 does it run better at start up or after its warmed and running down road
im trying diag with the tools we have .
computer and you ok here is what i want you to do
start bike , pull choke out , im simply checking for a intake leak by doing this we are adding more fuel. if the revs come down with choke out there are a few things we need to check. stick with me 2 things will happen if you do .
1. you will understand your bike better
2. you will prevent spending money on expensive fixes
also sparaying the fluid in did 2 things gave it more of something to burn and also with airfilter off it gave it more air hence hi rev
your right its not the point .
humor me ok. i have been riding for 22 years and wrenched on my own the entire time. also i have spent 42,000 on an education for motorcycles . humor me please. when im dealing with cv carbs i know what im doing . most of the years riding i rode most anything i could get my hands on cheap. inherited alot of problems some one else could not fix ect. there is a step by step method i have to work with carb problems that has been 100% efective . or i can throw you sugestions on whats wrong without diag. your choice.
and yes jaming the linkage down to idle it down can bend the throttle plate
carb diag 101
does bike idle .......yes but to high of an rpmintermiten problem with #4 cylinderpossible causes- carb problem and or valve clearencevalves get tighter as you put miles on this is normally most peaple think they get looseras they get tighter against valve train can cause them not open and close properly.
high idle is caused by to much air. causes of to much air are sticking slide,intake leak or damage to carb.
if you ride regularly cleaning is usually not a problem its non use that an gum up a carb
couple of things you can do to rule out most anything1. compresion check2. leakdown test3. carb checks and balancing
im simply going to start over with you.
you chop the throttle and it wont come down on the rpms even though the linkage works properly. you have a bank of 4 carbs and all are cv carbs. im going to be frank and honest.you want some one that has experienced this abnormality . with this particular problem . at first you were explaining 2 problems . lets deal with engine first . ok becouse if we do carbs then deal with engine it will change the settings on the carbs then we will have carb problems and your going to be upset with us. so engine first. your due for valve adjustment this needs to be done before carbs . only after the engine has had a valve adjustment can we even deal with carbs.