FST 840 It's Alive!!!!! - Kawasaki Teryx Forums: Kawasaki UTV Teryx Forum
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post #1 of 15 (permalink) Old 04-23-2010, 07:59 PM Thread Starter
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FST 840 It's Alive!!!!!

Just got the new bbk running. It's alive, but pretty noisy. Is there supposed to be much valve clatter noise with bigger cams and heavier valve springs. The intakes are set at .006" loose end of stock valve lash and the exhaust is at .008" tight end of stock lash. I am just wondering cause it is pretty loud, but has no covers on it. I have not heard it run before with no rubber or plastic covers so maybe that is the difference? It runs good, sounds good with the new muzzy pros, just noisy that's all. AFR at idle is 12.8 front and back ( I have dual AFE afr guages hooked up mounted in the dash). Maybe someone can comfort me or tell me its wrong. Thanks Dudebros.

2012 VIBRANT Blue Teryx 4, Muzzy pro's, ECU reflash, custom cage & roof, windshield, 14" STI HD Beadlocks & 32x10x14 STI Roctane's/Tatou 4S Tracks, Rigid Lights, Custom bumpers, Warn XT4000 winches front & rear, bedlift

2010 black, FST 840 stage II cams, DASA intake & injectors, BF throttle bodies, Msd, Muzzy Pro`s, Snorkeled, Warn XT 4000, EMP, 2 seat race cage, Custom rear Radiator, Unisteer, STI HD beadlocks and 30x10x14 EFX motoclaws

Last edited by tomanytoysnotnuftime; 04-23-2010 at 08:11 PM.
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post #2 of 15 (permalink) Old 04-23-2010, 08:22 PM
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all wrong, tear it down and start over! actually, i was the same way with my std bore! a little noisier than stock. maybe it is the stiffer valve springs?
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post #3 of 15 (permalink) Old 04-23-2010, 08:44 PM
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thats awsome, good for you. and thanks for the tie rod tip got problem solved.
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post #4 of 15 (permalink) Old 04-23-2010, 09:39 PM
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I bet that first ride will be a lot of fun. What bbk did you get & where did you get it? Been trying to get some info on the fundy kit & its always a couple weeks away. Mine needs it bad a I dusted my rings from the stock air filter.
Have a good time with the new engine, Crow
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post #5 of 15 (permalink) Old 04-24-2010, 01:25 AM Thread Starter
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Thanks guys, should be fun as long as there is no problems. I don't think I can wait anymore if I wreck and have to fix it again. Crow, I went with the FST 840 kit, stage II cams. Mickey was awesome to deal with, definately recomend him. Dasa air filter and intake adapter, dasa injectors, MSD maps, and some spare axles from Steve (good guy to buy from very accomadating), some brute throttle bodies from sumdumguy on Kijiji, a Sandjunkie YZF breather kit and swapped out my old std muzzy's for some new muzzy pro's from hunterworks (thanks Todd for your pipes). I would like to thank all the guys with their help with buying my parts and my numerous questions. Should move a bit better now, sure sounds fast anyway. I should get out today to break it in and break the spirit of my two buddie's with RZR-S's and force them to open up their wallets
Just a bit nervous about all the valve noise now, I hope I got them adjusted properly.

2012 VIBRANT Blue Teryx 4, Muzzy pro's, ECU reflash, custom cage & roof, windshield, 14" STI HD Beadlocks & 32x10x14 STI Roctane's/Tatou 4S Tracks, Rigid Lights, Custom bumpers, Warn XT4000 winches front & rear, bedlift

2010 black, FST 840 stage II cams, DASA intake & injectors, BF throttle bodies, Msd, Muzzy Pro`s, Snorkeled, Warn XT 4000, EMP, 2 seat race cage, Custom rear Radiator, Unisteer, STI HD beadlocks and 30x10x14 EFX motoclaws
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post #6 of 15 (permalink) Old 04-24-2010, 01:28 AM Thread Starter
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thats awsome, good for you. and thanks for the tie rod tip got problem solved.
Thanks big daddy, no problem glad I could help, can't remember what I did but it must have been great. Are you running now, up for a ride sunday. Give me a call.

2012 VIBRANT Blue Teryx 4, Muzzy pro's, ECU reflash, custom cage & roof, windshield, 14" STI HD Beadlocks & 32x10x14 STI Roctane's/Tatou 4S Tracks, Rigid Lights, Custom bumpers, Warn XT4000 winches front & rear, bedlift

2010 black, FST 840 stage II cams, DASA intake & injectors, BF throttle bodies, Msd, Muzzy Pro`s, Snorkeled, Warn XT 4000, EMP, 2 seat race cage, Custom rear Radiator, Unisteer, STI HD beadlocks and 30x10x14 EFX motoclaws
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post #7 of 15 (permalink) Old 04-24-2010, 06:54 PM
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Just finished my FST840 stage III cams and I love it The power is amazing. I will say that I didnt hear anymore valve train noise than stock. But, that is not saying you have a problem.. Just you may have better hearing than me But my bike does have a totally different sound than before. Congrats on your bike , I know your looking forward to the next trail ride to feel the diff it makes . I know I am

Merlin Motorsports custom Teryx
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post #8 of 15 (permalink) Old 04-24-2010, 07:06 PM Thread Starter
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Just finished my FST840 stage III cams and I love it The power is amazing. I will say that I didnt hear anymore valve train noise than stock. But, that is not saying you have a problem.. Just you may have better hearing than me But my bike does have a totally different sound than before. Congrats on your bike , I know your looking forward to the next trail ride to feel the diff it makes . I know I am
I definately don't have better hearing, the rear cylinder was just a little to loose. I readjusted them and it is alot better now, still some ticking but not much more than stock. As for the totally different sound than before holy s**t does it sound gnarly, like a race car instant revs and deep vibratiing idle with my new pro's. Think I will be putting the whisper cores for my kids sake. Cant wait till tomorrow when I ride it.
How's Merlins build coming?

2012 VIBRANT Blue Teryx 4, Muzzy pro's, ECU reflash, custom cage & roof, windshield, 14" STI HD Beadlocks & 32x10x14 STI Roctane's/Tatou 4S Tracks, Rigid Lights, Custom bumpers, Warn XT4000 winches front & rear, bedlift

2010 black, FST 840 stage II cams, DASA intake & injectors, BF throttle bodies, Msd, Muzzy Pro`s, Snorkeled, Warn XT 4000, EMP, 2 seat race cage, Custom rear Radiator, Unisteer, STI HD beadlocks and 30x10x14 EFX motoclaws
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post #9 of 15 (permalink) Old 04-24-2010, 07:20 PM
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I definately don't have better hearing, the rear cylinder was just a little to loose. I readjusted them and it is alot better now, still some ticking but not much more than stock. As for the totally different sound than before holy s**t does it sound gnarly, like a race car instant revs and deep vibratiing idle with my new pro's. Think I will be putting the whisper cores for my kids sake. Cant wait till tomorrow when I ride it.
How's Merlins build coming?
His will be done this weekend except his throttle bodies..Waiting on shipping. But everthing else done. I cant wait to see his doneIt is going to be awsome.

Merlin Motorsports custom Teryx
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post #10 of 15 (permalink) Old 04-24-2010, 09:22 PM
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congrats man...they sound so damn good!

2009 FST 840, Stage 3 cams, MSD, DASA 38mm TB's, DASA Intake, Hand Port and Polished, +1 valves, Muzzy Pro, Dalton, XMF custom 2 seater, bed delete, Twisted Stitch Seats....TBC.
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