better low end grunt?

[Doug@J&D racing]

i have a 05 450 yoshi full system,hcr needle and jet kit,airbox lid removed and one less tooth on my countershaft sprocket. where i ride is TIGHT single track. looking for a little more bottom end didnt know what cam to go with or if i had a different option? another question is handling. i hated this quad compared to my ol 400ex till i got duel rate springs from gt thunder and added a steering stab. and turned rebound all the way down any other handling tricks out there?

[07black400ex]

HRC cam

[Balaz_73*00]

Naw i'd look into the 02 crf cam. The hrc is more of a top end cam. I went from a stock to the 02 crf and I could drastically feel the bottom end difference, much more. I think u'd be happy with that if your looking for bottom end

[d3ktrix]

Originally posted by Balaz_73*00
Naw i'd look into the 02 crf cam. The hrc is more of a top end cam. I went from a stock to the 02 crf and I could drastically feel the bottom end difference, much more. I think u'd be happy with that if your looking for bottom end

Yup.
Either a 2002CRF, 2004-2006CRF, 2006-2006 HRC, or a Hotcams Stage1.

All low-mid range feeling.

[d3ktrix]

Here is a copy of the cam infromation posted over on the org by Sredish.



The Honda, and Hot cams are drop in cams which mean you can swap them out with out changing anything else. With the Megacycle and WEB cams you may need to change valve springs, cut valve guides, cut valve reliefs in the top of your piston depending on which one you choose.

Honda Cams

Honda 2004-2005 HRC Cam - Part # 14110-NLZ-650
Really strong to top end cam, with a decent mid range, but lacks bottom end.

Intake Lift(inches): .390
Exhaust Lift(inches): .350
Intake Lobe Center (degrees): 110
Exhaust Lobe Center (degrees): 105
Intake Duration (degrees at .040"): 264
Exhaust Duration (degrees at .040"): 268
Intake Open / Close: 22 btc/62 abc
Exhaust Open / Close: 59 bbc/29 atc
Lobe Separation Angle: 107.5
Overlap: 51

Honda 2002 CRF Cam - Part # 14110-MEB-670
A good all around cam, strong bottom and really strong mid range with a decent top end as well.

Intake Lift(inches): .380"
Exhaust Lift(inches): .356"
Intake Lobe Center (degrees): 106.5
Exhaust Lobe Center (degrees): 107
Intake Duration (degrees at .040"): 249
Exhaust Duration (degrees at .040"): 272
Intake Open / Close: 18 btc/51 abc
Exhaust Open / Close: 63 bbc/29 atc
Lobe Separation Angle: 106.75
Overlap: 47

Honda 2003 CRF Cam - 14110-MEB-770
A good mid range cam.

Intake Lift(inches): .380"
Exhaust Lift(inches): .336"
Intake Lobe Center (degrees): 109
Exhaust Lobe Center (degrees): 109
Intake Duration (degrees at .040"): 249
Exhaust Duration (degrees at .040"): 262
Intake Open / Close: 15.5 btc/53.5 abc
Exhaust Open / Close: 60 bbc/22 atc
Lobe Separation Angle: 109
Overlap: 37.5

Honda 2006-2007 HRC / 2004 - 2006 CRF - Part # 14110-NLZ-610 (CRF Part # 14110-MEN-670)
Really strong bottom with a decent mid range.

Intake Lift(inches): .374"
Exhaust Lift(inches): .313"
Intake Lobe Center (degrees): 248
Exhaust Lobe Center (degrees): 268
Intake Duration (degrees at .040"):
Exhaust Duration (degrees at .040"):

HotCams

HotCams Stage 1 - Part #1016-1
Excellent bottom end and midrange increase.

Intake lift (inches): .378"
Exhaust lift (inches): .343"
Intake lobe center (degrees): 106.5
Exhaust lobe center (degrees): 103.5
Intake duration (degrees at 1mm): 237.5
Exhaust duration (degrees at 1mm): 268.5
Lobe Separation Angle: 110
Overlap: 33

HotCams Stage 2 - Part #1024-2
Excellent midrange and top end increase, good all-around cam.

Intake lift (inches): .402"
Exhaust lift (inches): .343"
Intake lobe center (degrees): 106.5
Exhaust lobe center (degrees): 103.5
Intake duration (degrees at 1mm): 248
Exhaust duration (degrees at 1mm): 268.5
Intake Open / Close: 11 btc/ 53abc
Exhaust Open / Close: 55 bbc/23 atc
Lobe Separation Angle: 105
Overlap: 38.25

HotCams Stage 3 - Part # 1056-3
More top-end power than Stage 2. Will work well for TT and big bore/strokers.

Intake lift (inches): .409"
Exhaust lift (inches): .356"
Intake lobe center (degrees): 116
Exhaust lobe center (degrees): 104.5
Intake duration (degrees at 1mm): 251.5
Exhaust duration (degrees at 1mm): 265
Intake Open / Close: 10 btc/62abc
Exhaust Open / Close: 57 bbc/28 atc
Lobe Separation Angle: 110.25
Overlap: 37.75

Megacycle Cams

Megacycle X1 - Part # 108-x1
Race profile for increased mid to top end, must use race piston and valve springs. Intake valve pocket may need cut on piston.

Intake Lift(inches): .430"
Exhaust Lift(inches): .385"
Intake Lobe Center (degrees): 102
Exhaust Lobe Center (degrees): 106
Intake Duration (degrees at .040"): 266
Exhaust Duration (degrees at .040"): 282
Intake Open / Close: 31 btc/ 55abc
Exhaust Open / Close: 67 bbc/35 atc
Lobe Separation Angle: 104
Overlap: 66

Megacycle X2 - Part # 108-x2
Strong midrange / all-around. Must use race piston and valve springs. Intake valve pocket may need cut on piston

Intake Lift(inches): .412"
Exhaust Lift(inches): .350"
Intake Lobe Center (degrees): 108
Exhaust Lobe Center (degrees): 108
Intake Duration (degrees at .040"): 260
Exhaust Duration (degrees at .040"): 268
Intake Open / Close: 22 btc/58 abc
Exhaust Open / Close: 62 bbc/26 atc
Lobe Separation Angle: 108
Overlap: 48

Megacycle X3 - Part # 108-x3
Full race cam max top end. Must use race piston and valve springs. Intake valve pocket may need cut on piston.

Intake Lift(inches): .435"
Exhaust Lift(inches): .385"
Intake Lobe Center (degrees): 104
Exhaust Lobe Center (degrees): 108
Intake Duration (degrees at .040"): 276
Exhaust Duration (degrees at .040"): 276
Intake Open / Close: 34 btc/62 abc
Exhaust Open / Close: 66 bbc/30 atc
Lobe Separation Angle: 106
Overlap: 64

WEB Cam Inc.

613/812 - Part # 57-102
Performance profile to increase mid and upper end power. Higher compression recommended. Must be used with performance spring kit shortened valve guides and adjustable cam gears.

Intake Lift(inches): .381"
Exhaust Lift(inches): .357"
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .050"): 240
Exhaust Duration (degrees at .050"): 258

493/729 - Part # 55-462 Reduced Base Circle
Performance profile to increase mid and upper end power. Higher compression recommended. Must be used with performance spring kit shortened valve guides and adjustable cam gears.

Intake Lift(inches): .415"
Exhaust Lift(inches): .340"
Intake Lobe Center (degrees): ...
Exhaust Lobe Center (degrees): ...
Intake Duration (degrees at .050"): 252
Exhaust Duration (degrees at .050"): 252

493/739 - Part #
Performance profile to increase mid and upper end power. Higher compression recommended. Must be used with performance spring kit shortened valve guides and adjustable cam gears.

Intake Lift(inches): .415"
Exhaust Lift(inches): .410"
Intake Lobe Center (degrees): 110
Exhaust Lobe Center (degrees): 104
Intake Duration (degrees at .050"): 276
Exhaust Duration (degrees at .050"): 276
Intake Open / Close: 16 btc/48 abc
Exhaust Open / Close: 56 bbc/20 atc
Lobe Separation Angle: 107
Overlap: 62

208/921 - Part # 57-042 Reduced or Full Base Circle
Race profile. Higher compression required. Must use performance spring kit, shortened valve guides and adjustable cam gear.

Intake Lift(inches): .408"
Exhaust Lift(inches): .340"
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .050"): 282
Exhaust Duration (degrees at .050"): 298
Intake Open / Close: 19 btc/ 59abc
Exhaust Open / Close: 55 bbc/27 atc

Mysto - Part # 57-072 Reduced Base Circle
The "MYSTO" cam designed for race use ONLY. Higher compression required. Must use performance spring kit, shortened valve guides and adjustable cam gear. Check all clearances!

Intake Lift(inches): .432"
Exhaust Lift(inches): .350"
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .050"): 293
Exhaust Duration (degrees at .050"): 296
Intake Open / Close: 20 btc/ 60abc
Exhaust Open / Close: 54 bbc/26 atc

Johnson Cams

400 - 375 (Little Johnson)
Strong midrange and top end.

Intake Lift(inches): .400"
Exhaust Lift(inches): .375"
Intake Lobe Center (degrees): 108
Exhaust Lobe Center (degrees): 108
Intake Duration (degrees at .040"): 266
Exhaust Duration (degrees at .040"): 284
Intake Open / Close: 26°btc / 60°abc
Exhaust Open / Close: 71°bbc / 34°atc
Lobe Seperation Angle: 108
Overlap: 59

430 - 400 (Big Johnson)
Top end drag cam.

Intake Lift(inches): .430"
Exhaust Lift(inches): .400"
Intake Lobe Center (degrees): 110
Exhaust Lobe Center (degrees): 110
Intake Duration (degrees at .040"): 274
Exhaust Duration (degrees at .040"): 289
Intake Open / Close: 28°btc / 66°abc
Exhaust Open / Close: 74°bbc / 35°atc
Lobe Separation Angle: 110
Overlap: 61.5

Crower Cams

G2 - Part # H04-450-400 Reduced Base Circle
Increases in midrange and top end.

Intake Lift(inches): .400
Exhaust Lift(inches): .394
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .040"): 254
Exhaust Duration (degrees at .040"): 254

[400exrider707]

I am a huge fan of low end power and lugging it and just having it rip up from low RPM's.

I used the hotcam stage 1 for quite a while, and with just a filter/exhaust and this cam, the bottom end was unbelievable. It would pull 3rd gear out of very tight corners on the MX track with stock gearing and 18" rear tires. I LOVED it.

I put the HRC cam in the following year and bumped compression up. I never liked it after that. I dont think I went up enough in compression to get that snap I had with the stage 1. The only way I ever got it back was when we did a 14:1 piston and a stage 3 hotcam, but then it was more than a handful in the woods.

I would do stage 1 hotcam or the 02 CRF (very similar) if it was me...


If after all this, you're still looking for more, go ride a YFZ around, then get back on your Honda and you'll realize just how good your bottom end is.:D

[SHIFTx450]

HOTCAM!

COLDCAM! lol