450R Build Help - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums
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post #1 of 44 (permalink) Old 12-08-2016, 02:18 PM Thread Starter
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450R Build Help

Hello everyone,


I have a 2011 450R - I only ride in the sand and I wanted to get bottom to top range. I am not looking for a huge build. I currently have Dasa full exaust with a Dyno controller and K&N filer with open airbox.


I have the following work that I am starting on in a week or 2 - FCI Intake and powerstack filter, hot cams stage 3, port and polish. I need some information on the piston, Do I stay with the stock or switch it out.


Thanks for your input.
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post #2 of 44 (permalink) Old 12-08-2016, 03:28 PM
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If you're dedicated to running straight 110 gas you would get a nice bump in power by going to a 14:1 Piston. If you're staying on pump gas just use a stock Piston with a tighter squish. Who's doing the porting? I'm sure they will have some opinions on the Piston.

09 YFZ450R: 480 Athena, MMAD 14:1, Barkers, Vortex, MMAD +1 TI head, Lightspeed/warpspeed cam, Carrillo Rod, 44mm TB, FCI, Precision Stabilizer, Shcok & Vibe Clamps, Houser Slicast, Fox Evols, Motowoz
06 YFZ450: Venom Port, FCI, Dasa, Venom 12.25:1, 42mm FCR, Cam Mod, NCVQ Needle, CCP Stabilizer, LSR DC4, Elka Stage 4's, Shock & Vibe clamps
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post #3 of 44 (permalink) Old 12-08-2016, 04:15 PM
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These are all questions for whoever is doing the porting. They know what piston works with there work.
Did they recommend stage 3 cam?

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post #4 of 44 (permalink) Old 12-08-2016, 04:18 PM
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I would let your engine builder pick the piston, cams, and valves.


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Last edited by kilroy; 12-08-2016 at 07:54 PM.
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post #5 of 44 (permalink) Old 12-09-2016, 06:34 PM
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How are the hot cams stage 1? Is the low to mid better than stock?
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post #6 of 44 (permalink) Old 12-09-2016, 08:19 PM
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From what I've learned just about anything is better than the 09-16 stock fi intake cams, lot of guys are using the 06-08 yfz carb intake cams for mid to upper gains with porting people rave about this combo . For a pure low to mid gain go with the 08 yz450 dirtbike intake cam, I have one coming this week can't wait to try it
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post #7 of 44 (permalink) Old 12-09-2016, 09:04 PM
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Hello Badassmachinist,

How are you finding these cams online? Are they new or used? Do they need any tuning to get to work or can you put them in stock timing? Are you changing anything in the exhaust cam to help?

Thank you,
jody
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post #8 of 44 (permalink) Old 12-12-2016, 03:15 PM Thread Starter
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Thanks for the info everyone. The builder did say lets see what it looks like once he gets inside. Since its apart I just wanted to make sure I am asking all the right questions since this is my first 450R. I did receive my intake system today from FUEL with the brand new powerstack filter. Its pretty impressive filter. You can not run a box with it though its huge. The power gains are said to be worth it.
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post #9 of 44 (permalink) Old 12-13-2016, 02:39 PM Thread Starter
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Do you guys recommended anything I should get with this build? I only ride in the dunes. I like to race, jump, hill climb, trails and look for anything challenging.
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post #10 of 44 (permalink) Old 12-13-2016, 03:50 PM
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I'd recommend reading sheeriders rebuild thread. He is doing the same thing as you right now but he is further along. A lot of questions have been asked and info given.
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post #11 of 44 (permalink) Old 12-14-2016, 10:17 AM
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Yeah I'm currently doing my engine.
The top end is being handled by a shop.
If they say to get it then I do. I'm not going to question there work.
The bottom end i am taking care of.
I'm replacing everything. I just picked up all the bearings in the cases. By Friday all my oem parts should be here.
I still need to blast and wash my cases.

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post #12 of 44 (permalink) Old 12-14-2016, 11:24 AM
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What type of material are you going to use to blast your cases? I want to blast my front bumper and rear grab bar because they got hit with acid rain and the raw aluminum was spotted.


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post #13 of 44 (permalink) Old 12-14-2016, 12:54 PM
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Quote:
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What type of material are you going to use to blast your cases? I want to blast my front bumper and rear grab bar because they got hit with acid rain and the raw aluminum was spotted.
I use walnut shells or a light grit sand.
The surface will dull a bit, but it looks good and the sand and mud just wash right off.

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post #14 of 44 (permalink) Old 12-14-2016, 05:23 PM Thread Starter
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just curious, but why not just powder coat the cases or anything else for that matter?
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post #15 of 44 (permalink) Old 12-14-2016, 07:50 PM
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just curious, but why not just powder coat the cases or anything else for that matter?
Just preference.
I like the look of the aluminum when it's blasted.


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post #16 of 44 (permalink) Old 12-14-2016, 09:58 PM
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Quote:
Originally Posted by ferrarijody View Post
Hello Badassmachinist,

How are you finding these cams online? Are they new or used? Do they need any tuning to get to work or can you put them in stock timing? Are you changing anything in the exhaust cam to help?

Thank you,
jody


Well, I got a used set on eBay, looked great until I measured them, they were out of spec, the seller was cool gave me full refund , so I'm going brand new this time, and so should you. Leave your stock exhaust cam in , don't change timing on either cam, from what I hear no tuning necessary, both a big improvement over stock fi intake cam, on the 09 and up fi bikes the intake ports and cam is the weak link
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post #17 of 44 (permalink) Old 12-16-2016, 02:26 PM Thread Starter
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with the mods I am wondering if an extended swing arm is necessary. I still like to pull wheelies but with hole shots and racing I want to get a good pull off the line. Anyone running an extended swing arm with similar mods? Do you like it? Pros and cons?
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post #18 of 44 (permalink) Old 01-18-2017, 05:54 PM Thread Starter
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I have the port work done and have decided to go with Stage 3 hot cams with 13:1 CP Piston. Once I get everything back together I will post some pictures. I am still not sure if I will need to extend the swing arm. Has anyone had good luck with extending the stock swing arm? Or is it better just to go aftermarket? Suggestions?


Thanks
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post #19 of 44 (permalink) Old 01-18-2017, 06:15 PM
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Who did your port work?

2006 SE-DASA Classic Full System,FCI, Cam mod, OCP ported head and 42.5mm carb, Houser +2 stem, Flexx Bars 12* ATV Bend, Fox Floats.
53HP All OEM Engine parts on Pump Gas


Jetting Specs: 42p- 215m-4th clip NCVQ 2.0 out, 0-500'.

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post #20 of 44 (permalink) Old 01-18-2017, 07:12 PM Thread Starter
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Who did your port work?


I used a local shop in Oregon - CPRacing - I have used this shop for over 10 years with other quads and have always have a great experience.
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