GYTR cam upgrade on 2013 WR450



9 replies to this topic
  • Bass Mechanic

Posted August 13, 2013 - 02:18 PM

#1

what kind of gains might I expect if I were to go with the performance cams for the WR? the top end seems a little flat. would they wake the top end up a little?



  • smallblocktuner

Posted August 21, 2013 - 04:34 PM

#2

I have the gytr cams installed in my 2012 wr450. I wasn't to impressed with them. My bike has ecu, fmf silencer, air box mod, and have tried several maps. I was expecting overall more power ,but to be honest have only noticed worse fuel mileage. Thinking about pulling the head and getting it ported.



  • KennyMc

Posted August 21, 2013 - 09:46 PM

#3

Is that any different than going from a WR cam to a YZ cam? Or are these cams degreed to thei own spec's? On my '07WR, going to the YZ cams made a big difference. These might be a completely different animal. I was just wondering since the comment was made about not all that happy with them.

  • Bass Mechanic

Posted August 29, 2013 - 10:55 PM

#4

well if it helps any i just got my bike dyno tuned and stock cams degreed.

HUGE difference the bike is making 53hp at the wheel (+6 from stock) and the torque is all the way to rev limiter.

the bike used to fall flat at about 6k rpm and now it pulls like a scalded cat all the way tot he top end.

cost me 400 bucks total and 1 day in the shop.

i got a custom map from the mechanic and I've noticed that i am getting about 43 mpg on the trails, couldn't be happier!



  • aussieklx

Posted August 30, 2013 - 03:20 AM

#5

well if it helps any i just got my bike dyno tuned and stock cams degreed.
HUGE difference the bike is making 53hp at the wheel (+6 from stock) and the torque is all the way to rev limiter.
the bike used to fall flat at about 6k rpm and now it pulls like a scalded cat all the way tot he top end.
cost me 400 bucks total and 1 day in the shop.
i got a custom map from the mechanic and I've noticed that i am getting about 43 mpg on the trails, couldn't be happier!


Lovely

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  • MidlifeCrisisGuy

Posted August 30, 2013 - 09:00 PM

#6

well if it helps any i just got my bike dyno tuned and stock cams degreed.

HUGE difference the bike is making 53hp at the wheel (+6 from stock) and the torque is all the way to rev limiter.

the bike used to fall flat at about 6k rpm and now it pulls like a scalded cat all the way tot he top end.

cost me 400 bucks total and 1 day in the shop.

i got a custom map from the mechanic and I've noticed that i am getting about 43 mpg on the trails, couldn't be happier!

 

How does one degree the cams on this engine ?   I thought the cams were solidly attached to the cam sprockets ?

 

What was the final setting that worked the best ?

 

How was the low end power affected ?   Will it still tractor around in 1st gear ?



  • Bass Mechanic

Posted August 30, 2013 - 09:12 PM

#7

How does one degree the cams on this engine ? I thought the cams were solidly attached to the cam sprockets ?

What was the final setting that worked the best ?

How was the low end power affected ? Will it still tractor around in 1st gear ?


The gears are press fitted to the shafts, press them off and back on in the new position.
Didn't loose any bottom end at all, in fact I think about a 2 Hp gain off idle and increases up to 6 Hp all across the rev range

  • MidlifeCrisisGuy

Posted August 31, 2013 - 08:04 AM

#8

The gears are press fitted to the shafts, press them off and back on in the new position.
Didn't loose any bottom end at all, in fact I think about a 2 Hp gain off idle and increases up to 6 Hp all across the rev range

 

Good to know !

 

Any chance that the next time you check your valves you could take a few measurements on what the final settings were and share them ?  Or get them from the shop that did the work ?  I doubt that I could find anyone locally to do this sort of thing.

 

I wonder how your settings would compare to retarding  the exhaust cam 1 tooth ?



  • Bass Mechanic

Posted August 31, 2013 - 01:50 PM

#9

I couldn't tell ya, the guy who did mine is Bruce sass he is a very well known tuner. Works at vickery motors in Denver.
I'm certain the cam mod of 1 tooth out of time is a bandaid at best, why bother changing anything with a guess verses just doing it correctly?
I am pretty sure you'll need access to a press to remove and reinstall the gear. I also heard he has to modify the auto decompressor slightly to aid starting.
All I know is my bike runs great and for 400 bucks was the most significant improvement in performance out of the 700 worth of bolt ons I've done, I did the comp ecu and programmer, and the gytr pipe. They helped but the sum total of both was nothing compared to the tune. The tune won't do you any good though unless you do the pipe because degree-Ing the cams takes advantage of exhaust scavenging. And that won't happen unless you have a free flowing exhaust

  • Ride-n-Hard

Posted August 31, 2013 - 06:29 PM

#10

I'd be happy with just the 43mpg vs 40 to the low light. (G)
Pretty impressive getting 53 hp.




 
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