Red hot exhaust...

elfie2007 · 09-13-2007, 08:18 PM

I have a 2001 YZ250F it was really hard to start so I adjusted my valve shims and double checked that the clearance was to spec but after a minute of fire up my exhaust is glowing orange. The bike did sit for about a month or so could the carbs be gumed up from sitting and they just need to be cleaned out or do i need to do some serious checking of the valves and compression test? If anybody has any info on this drop me a line on what I should be doing Thanks Elfie

tigmaster · 09-13-2007, 08:26 PM

really hard to start? every time? did the header glow before? backfire while trying to start? does it lack power while riding? if your answering order was: yes, yes, no, yes, yes then you have a bad cdi or u managed to shear a keyway and timing is off. otherwise i will give u a lot more other things to check. just thought i would get this out first.

wr250f95 · 09-13-2007, 08:43 PM

the pipe on our bikes is cooled by air passing over it, when they are sitting still, no air is passing over it, that and I dont think you would want to touch your exhaust for about an hour and a half after riding it for a while.
also for the starting you do realize that their is a starting procedure for these bikes right?
ThumperFaq: The Starting Drill

tigmaster · 09-13-2007, 10:10 PM

ya, a lot of people say that their headers glow after the bike sitting for over a minute. thats y i asked if it glowed before.

09-13-2007, 08:18 PM	#1 (permalink)
elfie2007 C Rider Join Date: Sep 2007 Posts: 2 iTrader: (0)	Red hot exhaust... I have a 2001 YZ250F it was really hard to start so I adjusted my valve shims and double checked that the clearance was to spec but after a minute of fire up my exhaust is glowing orange. The bike did sit for about a month or so could the carbs be gumed up from sitting and they just need to be cleaned out or do i need to do some serious checking of the valves and compression test? If anybody has any info on this drop me a line on what I should be doing Thanks Elfie

09-13-2007, 08:26 PM	#2 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,659 iTrader: (1)	really hard to start? every time? did the header glow before? backfire while trying to start? does it lack power while riding? if your answering order was: yes, yes, no, yes, yes then you have a bad cdi or u managed to shear a keyway and timing is off. otherwise i will give u a lot more other things to check. just thought i would get this out first. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

09-13-2007, 08:43 PM	#3 (permalink)
wr250f95 Super Moderator Join Date: May 2007 Location: New Mexico Posts: 8,467 iTrader: (1)	the pipe on our bikes is cooled by air passing over it, when they are sitting still, no air is passing over it, that and I dont think you would want to touch your exhaust for about an hour and a half after riding it for a while. also for the starting you do realize that their is a starting procedure for these bikes right? ThumperFaq: The Starting Drill __________________ "LIFE'S JOURNEY IS NOT TO ARRIVE AT THE GRAVE SAFELY IN A WELL PRESERVED BODY, BUT RATHER TO SKID IN SIDEWAYS, TOTALLY WORN OUT, SHOUTING'...HOLY S**T... WHAT A RIDE!" this, is why I ride.

09-13-2007, 10:10 PM	#4 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,659 iTrader: (1)	ya, a lot of people say that their headers glow after the bike sitting for over a minute. thats y i asked if it glowed before. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
mods on Silencing exhaust	spyderx17	Mods & Performance Forum	11	08-23-2007 09:20 PM
New 2007 Complete Dirt Bike Exhaust Honda, Crf, Z50	Mototips	Items for sale on ebay	0	08-14-2007 04:04 PM
Pro Circuit Dirt Bike Works Exhaust Kawasaki Kx125	Mototips	Items for sale on ebay	0	06-29-2007 02:00 PM
BBR Releases Exhaust for CRF150R	Mototips	DirtRider news	0	10-31-2006 10:20 AM
FMF Continues Leadership Role in OHV Exhaust Sound Education	Mototips	DirtRider news	0	10-19-2006 06:43 PM

Remove advertisements Sponsored links