timing

This area is for help needed with the FZR 250. Such as engine, suspension, exhausts etc.

Moderators: dave, dontz125, Trev084

timing

Postby johnnyangel » Mon Apr 30, 2012 10:45 pm

ok grab a beer and cig, timing!!! I am not sure where i am with my timing, i have just put new shims in and put evrything back together took for a run not happy something was wrong checked the cam again was one tooth out only took inlet can out, move the cam so timing marks line up went for another ride still not right that was yseterday, today got home stripped down to the cam again and lined up marks, cams to cam caps ok T mark in line with mark on cover (rhs) valve lobes opposite each other on No 1 piston, piston tdc used pencil in plug hole but it looks like No 4 intake is about to fire cam lobe about to open no 4 intake valves and i am rotating engine to the front (clockwise) from rhs of motor (when I was doing the shims only had one pair to measure all 8 intake valves so had to swap from cyl to cyl and accidently turned the motor without chain tensioner in ) I may have set evrything 180 degrees out!!!! fzr400 manual say counter clockwise which put No 1 ready to fire, I'm confused here which is the right direction have they swapped things around to the 250 (are timing marks on different sides of engine?)
should i keep going clockwise to set timing?
confused because it seems a long way of for cam to fire if at tdc and cam lobes are opposite each other 3/4 turn of cam
totally confused can anyone decipher this and help me out?
johnnyangel
Rider
 
Posts: 74
Joined: Sat Jul 23, 2011 9:51 am
Location: Redcliffe,Qld

Re: timing

Postby dave » Thu May 03, 2012 10:09 pm

The FZR400 flywheel is on the opposite side of the engine, therefore you turn it the opposite direction to the 250 when looking at the flywheel.
It is in fact the same direction when viewed from the same side.

180 deg out wont matter. Just make sure the cams are on the marks and it will all work because of the wasted spark system.

and i am rotating engine to the front (clockwise) from rhs of motor
from the foot brake side is correct
DAVE Image

ImageDAVE's websiteImage Always remember that you're unique. Just like everyone else.
User avatar
dave
ADMINISTRATOR
 
Posts: 2159
Joined: Wed Apr 13, 2005 12:04 am
Location: Burnie, Tasmania (the south island of Australia) BIKE = SV1000N

Re: timing

Postby johnnyangel » Fri May 04, 2012 6:39 pm

thanks m8 just making sure, don't think there are too many bikes that rotate anti-cl-wise, and i decided while i'm at it may as well replace the exhaust shims but after checking them again didn't need to, at the moment I am boiling the airbox rubber boots in coolant (overnight) in crock-pot see if that makes any difference putting them on, will soon find out 2morrow, after I buy missus new crock-pot
thanx m8
johnnyangel
Rider
 
Posts: 74
Joined: Sat Jul 23, 2011 9:51 am
Location: Redcliffe,Qld

Re: timing

Postby johnnyangel » Sat May 05, 2012 4:49 pm

WOW!! first time bike has started so easy, got it all back together and running no road test yet, have to do a front wheel alignment after i replace right fork leg got a leak somewhere so i'll take one of off donor bike, and i put too much tension on nut for coolant drain plug and snapped head of easy fix there, other than that looks good big test will be the road test hopefully midday tomorrow
johnnyangel
Rider
 
Posts: 74
Joined: Sat Jul 23, 2011 9:51 am
Location: Redcliffe,Qld


Return to Yamaha FZR 250 - I have a problem!

Who is online

Users browsing this forum: No registered users and 2 guests

cron