ninjette.org

Go Back   ninjette.org > 2008 - 2012 Ninja 250R > 2008 - 2012 Ninja 250R Tech Talk

Reply
 
Thread Tools
Old August 17th, 2019, 03:58 PM   #1
nocturncal
ninjette.org member
 
nocturncal's Avatar
 
Name: Cal
Location: San Francisco
Join Date: Jun 2017

Motorcycle(s): '09 Ninja 250R

Posts: 170
Timing Chain Wear

Is there a service limit on timing chain stretch for the new gen 250s? I couldn't find anything in the service manual, and digging through other forum thread mentioned only the pre gen service limits.

If there is, is there a way to check the chain stretch limits on the timing chain without splitting the case?

I'm still trying gather some data to track down a ticking engine noise on the right side. New CCT didn't solve the problem, valves are adjusted, cover bolts tightened in sequence and within torque specs. Ticking noise is not present when bike is cold, only when bike is warmed up.
nocturncal is offline   Reply With Quote




Old February 20th, 2020, 10:22 PM   #2
cuong-nutz
RIP Alex
 
cuong-nutz's Avatar
 
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011

Motorcycle(s): '10 250r, '09 265r

Posts: A lot.
Blog Entries: 2
Ever figure it out?
Cracking it open is the best best unless you have a good eye when you're doing your valve adjustment and measuring then.

It's been spoken before on here and done. I've had as stretched one and a couple of others have.
__________________________________________________
HalfFast Racing Team
Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days
cuong-nutz is offline   Reply With Quote


Old March 5th, 2020, 10:01 PM   #3
nocturncal
ninjette.org member
 
nocturncal's Avatar
 
Name: Cal
Location: San Francisco
Join Date: Jun 2017

Motorcycle(s): '09 Ninja 250R

Posts: 170
Quote:
Originally Posted by cuong-nutz View Post
Ever figure it out?
Cracking it open is the best best unless you have a good eye when you're doing your valve adjustment and measuring then.

It's been spoken before on here and done. I've had as stretched one and a couple of others have.
I never ended up doing anything. 12,000+ miles later the sound hasn't gotten worse. I thoughy maybe I was just overreacting/ maybe noise from clutch.

I've been wondering though what the service limit was for the can chain, I went through the service manual and I have a cyclepedia subscription, and neither one mention a service limit measurement for the cam chain.

I was hoping I could find the service limit numbers for the cam chain and take a pin to pin measurement next time I do a valve adjustment
nocturncal is offline   Reply With Quote


Old March 5th, 2020, 11:39 PM   #4
DannoXYZ
ninjette.org certified postwhore
 
Name: AKA JacRyann
Location: SF East Bay
Join Date: Dec 2011

Motorcycle(s): CB125T, Ninja250R racer, Ninja250R street bike, EX250F#1, EX250F#2, EX250E, VF500F, CBR600RR

Posts: A lot.
MOTY - 2018, MOTM - Nov '17
Here's specs.

New chain should measure 20-link length under 5 kg tension = 127.0 ~ 127.4 mm.

The service limit is 128.9 mm.
DannoXYZ is offline   Reply With Quote


Old March 6th, 2020, 10:53 PM   #5
cuong-nutz
RIP Alex
 
cuong-nutz's Avatar
 
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011

Motorcycle(s): '10 250r, '09 265r

Posts: A lot.
Blog Entries: 2
Quote:
Originally Posted by DannoXYZ View Post
Here's specs.

New chain should measure 20-link length under 5 kg tension = 127.0 ~ 127.4 mm.

The service limit is 128.9 mm.
What he said. Just make sure you measure from different sections as link sections stretch more than the others.
__________________________________________________
HalfFast Racing Team
Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days
cuong-nutz is offline   Reply With Quote


Old March 7th, 2020, 12:55 PM   #6
DannoXYZ
ninjette.org certified postwhore
 
Name: AKA JacRyann
Location: SF East Bay
Join Date: Dec 2011

Motorcycle(s): CB125T, Ninja250R racer, Ninja250R street bike, EX250F#1, EX250F#2, EX250E, VF500F, CBR600RR

Posts: A lot.
MOTY - 2018, MOTM - Nov '17
Unfortunately this test requires you to remove timing-chain from engine to measure full 20-links.

I saw another post where someone measured just 10-links, which can be done on bike. Can't find post now, but if you divide everything by 1/2, that should also work. Spin engine forward by hand to get tension on chain, then measure. Spin engine 90-120 degrees and repeat 2x more for 3 measurements total. Should give you good idea of cam-chain wear.
DannoXYZ is offline   Reply With Quote


Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Timing Chain Replacement FluxX 2008 - 2012 Ninja 250R Tech Talk 10 June 12th, 2019 11:28 AM
Cam Chain Timing Jessevelazco 1986 - 2007 Ninja 250R Tech Talk 1 March 13th, 2016 06:03 AM
Installing camshafts and timing chain guides br1ckd 1986 - 2007 Ninja 250R Tech Talk 7 June 26th, 2015 09:02 PM
Ex.side timing chain guide alex.s 2008 - 2012 Ninja 250R Tech Talk 5 September 23rd, 2012 10:09 AM
Timing chain ticking n4mwd 1986 - 2007 Ninja 250R Tech Talk 15 April 27th, 2011 05:09 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Motorcycle Safety Foundation

All times are GMT -7. The time now is 04:52 AM.


remote server monitor
Powered by vBulletin®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Except where otherwise noted, all site contents are Copyright 2019 ninjette.org, All rights reserved.