Another 06YZ450F Not starting Question?
Posted December 07, 2007 - 06:12 AM
It started up before i did this work to it and i ran it for about 10 mins.
Heres what i have done to it.
1.Replaced all waterpump parts and oil seal on water pump.
2.Installed i think its a MSR fuel screw
3.Installed 48 pilot jet - 42 was in there before.
4.installed 170 main jet.
4.Installed oring on ap linkage - oring mod
5.put in new oil and coolant.
Removed the Cam chain tensioner to check it and reinstalled, I didnt move any thing when it was out. I even rechecked my valve timing. cam gear indents at 12 & 3 oclock position lined up level with top of head. Timing marks on flywheel just past the 3rd line when conuting lines from left to right, so i dont think i slipped any teeth on the cam chain.
Fuel screw i adjusted from 1 turn out to 4 while attempting start, nothing seems to work. It back fired a few times and seemed like it wanted to start.
Ive tried with gas on-off - choke off- on.
ive pulled the plug and changed it out with some other good used ones, im getting spark. Im going to pick up some new ones at lunch today.
Plug is wet
oil is just above the dipstick full line crosshatching.
The thing is giving me a good work out - I miss my DRZ electric start.
I was wondering if the little oring on the fuel screw tip, if it got distorted when installing it, would that affect it or if it was distorted would it make it that hard to start?
Im lost i hope someone has some input.
Posted December 07, 2007 - 06:39 AM
But the plus is wet eh...tells me it is flooded
when you put a new plug in,turn on the gas, just twist the throttle 2-3 turns and no more period - do not inadvertantly twist while kick starting
Try this -
pull choke -
kick over 4-8times if nothing
engage hot start try again
if nothing - turn choke off
try above routine again
If nothing - you have either a ap mod or fuel screw issue - return to stock (or replace with Zipty)
Posted December 07, 2007 - 03:32 PM
Posted December 07, 2007 - 08:24 PM
Posted December 07, 2007 - 08:54 PM
Posted December 07, 2007 - 09:35 PM
Roger that. when it is right it is smooth as butter.
Make sure you are not kicking too hard. Yamis need a slow smooth kick.
Posted December 07, 2007 - 09:38 PM
I pulled the carb and removed the fuel screw and compared them, the sun line dosent have the same kind of taper that the oem has so i put the oem back in for now and set it to 2-1/8th turns. I finally got it started tonight after 40 mins of on & off kicking. I miss my DRZ electric start. thanks for all the help everyone.
If that thing is taking that long to start, you have other issues. Sounds to me like the jetting is fat.
Posted December 10, 2007 - 05:37 AM
1) turn gas on
2) turn choke on
3) twist throttle to WOT 3 times
4) kick bike
if it starts up right away (in first 1-5 kicks, great)..
if it doesnt start, i know its flooded. i'll go finish getting my gear on or start hydrating, whatever, come back in 5 minutes and kick it again. it will usually start on that first kick.
just tryin to help ya.
i have an 06 too, i know youve messed with your carb, so, might not be the same procedure i do.
Posted December 19, 2007 - 08:16 AM
I thought it was the pilot jet blocked but you know what.
I had been playing with the idler.
Turning up the idle screw I can get it to start and stay started when cold.
Let it run a bit with the choke then turn the idle down a bit.
Then turn the choke off and adjust to normal and it works good..
I know this is weird and lame. I really don't want to start messing in the carb as I have 10 thumbs. But I have been running fuel cleaner in the gas,
Anyways sorry for the lame post but it works for me.
BTW coincidentally in playing with the idle, when it was running a bit fast I found it a LOT easier for me to do jumping. No engine braking hahah..
Yamaha YZ450F 2017 by Chris.GVS
2016 YZ450 by CaptainKnobby
Megabomb Fitment by 288yz450
YZ450FX OR YZ450F by MESSMAKER