RE: BIG problem with 99 cbr 600f4 - HELP !!
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 7/9/2008 5:36:40 AM
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MartiniRossy
Posts: 69
Joined: 7/2/2008
From: Le Sueur, MN
Status: offline
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Yeah send me a pic at ross.dolly82@yahoo. If it''s what I''m thinking, it''s the air injection control valve that you are looking at in the front of the motor. Should have 2 large hoses that go down into the top of the head and 1 small hose that runs to the back of the carbs. At any rate, if there is a popping sound coming from there, definately have some kind of motor/timing issues. Perhaps the timing is far enough off, blowing out back through the air injection valve.
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 7/9/2008 5:27:04 PM
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screaminwoody
Posts: 28
Joined: 11/12/2007
Status: offline
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yep that sounds like you decsribe.
if that valve''s bad am i better off taking it in for a diagnostic ?
i''ll send u the pic
thx !
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 7/11/2008 7:40:07 PM
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slow_azz_f4
Posts: 16
Joined: 6/23/2008
Status: offline
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i forgot to meantion... it could also be an electrode that broke off of a spark plug
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99 CBR600, ported, polished & milled head, custom reground intake cam, rejetted carbs, adv timing, full yoshi exhaust, 520 chain conv, alloy rear sprkt +2, bike is still slow!!!
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 7/11/2008 7:41:46 PM
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slow_azz_f4
Posts: 16
Joined: 6/23/2008
Status: offline
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well wait i just read what MartiniRossy said, i think hes right
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99 CBR600, ported, polished & milled head, custom reground intake cam, rejetted carbs, adv timing, full yoshi exhaust, 520 chain conv, alloy rear sprkt +2, bike is still slow!!!
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 7/15/2008 8:50:29 PM
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ajlong
Posts: 223
Joined: 1/31/2006
Status: offline
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The cctl strikes again.... Sorry to hear about the problems.
_____________________________
To many mods to list.... To many mods yet left to do.
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 7/21/2008 5:22:20 PM
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screaminwoody
Posts: 28
Joined: 11/12/2007
Status: offline
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back again...and its NOT good...couldnt get much worse actually...
so the latest is we couldn''t get the # 3 plug to start threading the other night so i finally bit the bullet and took the bike in to the shop thursday to have the head heli-coiled for $75...great right ?
wrong...the shop calls today and the good news is yes the loose plug was more than liklely causing all of the missing & popping...but the really bad news is that the jack-ass previous owner stripped the frickin'' threads trying to get that frickin'' crap autolite plug in #3 so bad it can''t be heli-coiled...even if they remove the head...so then he tells me i need a new head ?? wtf !
so he quotes me $1100 plus appx 10 hours labor at $75 p/hr....$1850 !!!!...wtf !!!
but another shop quoted me 5 hours at $350 for labor...so is the shop who has my bike hosin'' me because they''ve got the bike and he''s got me by the nads or what ?
anyway they''ll agree to put my own head on if i bring one in and just charge me labor....so anyone have any opinons on getting a used or a new head ? should i ask the first guy if he can come down on his labor ? and take it to the other shop if he won''t ?
i can get a used head for about $300 from a salvage yard...or i can get new on ronayers.com ($695) or on mrcycles.com ($679)...but i figured it''s an old bike so i dont want to sink alot of cash into it...so i''m looking to go cheap at this point....but i dont want to have any problems later either.
any thoughts ?
thx again!
signed...so-bummed-out-i''m-damn-near-sucidal-in-michigan
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 7/23/2008 9:25:49 AM
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screaminwoody
Posts: 28
Joined: 11/12/2007
Status: offline
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Thx everybody for their input...you guys helped big-time.Ok so I found a clean used head assy on e-bay for $ 120 and ordered the gasket from ronayers.com for $ 50.
And I called the service manager at the shop and he''s going to match the other labor quotes I got at 5 hours...so if all goes well (KNOCK ON WOOD!!)... I''ll have the parts by next Monday and get the bike back by the end of next week good to go...all for about $500...more than I wanted to spend but a hell of alot better than $1850 !!Thx again to everyone who helped...I''ll let you know the outcome !
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 7/23/2008 9:44:26 PM
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jessej05
Posts: 228
Joined: 2/13/2008
Status: offline
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damn well good to hear its sounds like you got a fix. good luck bro.
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 7/25/2008 5:27:23 PM
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iliveintn
Posts: 3
Joined: 7/2/2008
Status: offline
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you couldve just bought an entire new motor for 500 and installed it yourself.
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 7/25/2008 5:47:11 PM
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Aweasel
Posts: 368
Joined: 6/6/2008
From: Cincy, OH
Status: offline
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F4i head and TB assembly ftw
_____________________________
99 F4...mostly.
“That which can be destroyed by the truth should be.”
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 9/17/2008 6:50:56 PM
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screaminwoody
Posts: 28
Joined: 11/12/2007
Status: offline
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He''s baaaaack....finally !
Thx everybody for their input...haven''t been able to check back in lately...(stupid kids...no time! J/K !!)...but I got the bike back 7/31 and it runs awesome....turns out the previous owner DID waste the # 3 cylinder threads with Auto-crap plugs....so the plug was blown out of the threads and that what''s caused all the missing popping, back-firing, etc.....so I had the shop use the used head assy & new gasket I got on ebay, change oil & filter, new ngk plugs, new brakes and fluid all around, new air filter, new coolant, adjust my new manual cct, all for $700 parts and labor...with free pick-up and delivery...and now it purrs like a kitten but runs like a raped ape...cost me 6 weeks of riding time but I couldn''t be happier with the end result.
All you guys helped big-time so thx !! Moral of the story...if you dont thread your news pulgs correctly...you WILL be totally *UCKED !!
Thx again to everyone who helped !
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RE: BIG problem with 99 cbr 600f4 - HELP !! - 9/18/2008 8:28:03 PM
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jonld
Posts: 185
Joined: 3/28/2005
Status: offline
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another thing is to never change the plugs when the engine is hot. Because of expansion and contraction its easier to f''up the threads. Thats what the PO done to my Beetle. Glad you got your bike back. I would have had to do the work myself though. I''ve swapped motors in mine twice now at $500 or less per motor. At those rates, I guess I really need a shop.
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''''''''''''''''99 CBR600F4
''''''''''''''''01 CBR600F4i
''''''''''''''''87 Yamaha Virago XV1100
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