Hotcams
Camshafts
Intake Exhaust Lift Duration Lift Duration
YAMAHA
Models
Years Hot Cam
(mm) (@ 1mm) (mm) (@ 1mm) Part No
Intake Cam. Stage 1. Increases bottom and midrange power for improved snap. *1 Exhaust Cam. Stage 1. Increases bottom and midrange power for improved snap. *1 Intake Cam. Stage 1. Excellent bottom-end and midrange increase: Designed with Improved Throttle Response (I.T.R.) technology. *1 Exhaust Cam. Stage 1. Excellent bottom-end and mid-range power increase: Designed with Improved Throttle Response (I.T.R.) technology. *1
8.48
249°
.IN
56-C309 56-C309
WR 250F
2001 - 13
8.1
252°
.EX
9.58 252.4°
.IN.STG1
56-C332
WR 250F
2015 - 19
8.59 246.70°
.EX.STG1
56-C159
Intake Cam. Stage 1. Increases bottom and midrange power for improved snap. *1,*6 8.48 Exhaust Cam. Stage 1. Increases bottom and midrange power for improved snap. *1,*6
249°
.IN
56-C309 56-C309
YZ 250F
2001 - 13
8.1
252°
.EX
Intake Cam. Stage 1. Excellent bottom-end and midrange increase: Designed with Improved Throttle Response (I.T.R.) technology. *1 Exhaust Cam. Stage 1. Excellent bottom-end and midrange increase: Designed with Improved Throttle Response (I.T.R.) technology. Includes auto-decompression mechanism. *1 Intake Cam. Stage 1. Good bottom-end and mid-range increase up to 10,800 RPM with slight top end loss. *1 Exhaust Cam. Stage 1. Good bottom-end and mid-range power increase up to 10,800 RPM with slight top end loss: Designed with Improved Throttle Response (I.T.R.) technology. Includes decompression mechanism. *1 Intake Cam. Stage 2. Good gains 9,200 RPM to rev limiter with no bottom-end loss: Designed with Improved Throttle Response (I.T.R.) technology *1 Exhaust Cam. Stage 2. Good gains 9,200 RPM to rev limiter with no bottom-end loss: Designed with Improved Throttle Response (I.T.R.) technology. *1
9.58 252.4°
.IN.STG1
56-C332
YZ 250F
2014 - 16
8.59 246.70°
.EX.STG1
56-C332
9.47 248.44°
.STG1
56-C152
8.59 245.59°
.STG1
56-C153
YZ 250F
2017 - 18
9.91 256.89°
.STG2
56-C152
9.02 252.83°
.STG2
56-C153
Intake Cam. Stage 1. Exhaust Cam. Stage 1/2. Intake Cam. Stage 2. Intake Cam. Stage 2. Exhaust Cam. Stage 1/2.
10.110 253°
.IN.STG1 .EX.STG1 .IN.STG2 .IN.STG2 .EX.STG1
56-C163 56-C164 56-C163 56-C163 56-C164
YZ 250F
2019 - 20
9.398 249.80°
10.410 257.35° 10.410 257.35°
YZ 250FX
2020 - 21
9.398 249.80°
Intake Cam. Stage 1. Excellent midrange and top-end increase. "Minimal bottom-end loss below 3,000rpm, usable power increase from 3,500 - 10,800rpm". *1, *3, *7 Exhaust Cam. Stage 1. Excellent midrange and top-end increase. Must be bought in conjunction with Intake cam .IN 56-C302 Intake Cam. Stage 1. Good low to mid range gains up to 9200 RPM with minor loss to redline. *1 Exhaust Cam. Stage 1. Good low to mid range gains up to 9200 RPM with minor loss to redline: Designed with Improved Throttle Response (I.T.R.) technology. *1 Intake Cam. Stage 2. Slight bottom end gain to 4800 RPM and good gains from 6500 RPM to redline. *1 Exhaust Cam. Stage 2. Slight bottom end gain to 4800 RPM and good gains from 6500 RPM to redline: Designed with Improved Throttle Response (I.T.R.) technology. *1
8.86
269°
.IN
56-C302
WR 450F
2003 - 15
8.67
265°
.EX
56-C320
10.41 248.39°
.IN.STG1
56-C160
9.58 205.20°
.EX.STG1
56-C161
WR 450F
2016 - 18
10.80 262.55°
.IN.STG2
56-C160
10.16 260.39°
.EX.STG2
56-C161
Intake Cam. Stage 1. Excellent midrange and top-end increase. "Minimal bottom-end loss below 3,000rpm, usable power increase from 3,500 - 10,800rpm". *1, *3, *7 8.86
269°
.IN
56-C302
YZ 450F
2003 - 09
Exhaust Cam. Stage 1. Excellent midrange and top-end increase. *1
8.7
265°
.EX
56-C302
Intake Cam. Stage 1. Increased power up to 9000 RPM with no loss on the top-end: Improved throttle response. *1 Exhaust Cam. Stage 1. Increased power up to 9000 RPM and no loss on the top-end: Improved throttle response. *1 Intake Cam. Stage 2. Improved power from 6000 RPM to rev limiter with a slight loss at lower RPM. More power from 8000rpm and up than Stage 1. Exhaust Cam. Stage 2. Improved power from 6000 RPM to rev limiter with a slight loss at lower RPM. *1 Intake Cam. Stage 1. Excellent low to mid-range increase: Designed with Improved Throttle Response (I.T.R.) technology. *1 Exhaust Cam. Stage 1. Excellent low to mid-range increase: Designed with Improved Throttle Response (I.T.R.) technology. *1 Intake Cam. Stage 1. Good low to mid range gains up to 9200 RPM with minor loss to redline. *1 Exhaust Cam. Stage 1. Good low to mid range gains up to 9200 RPM with minor loss to redline. : Designed with Improved Throttle Response (I.T.R.) technology. Intake Cam. Stage 1. Good low to mid range gains up to 9200 RPM with minor loss to redline. *1 Exhaust Cam. Stage 1. Good low to mid range gains up to 9200 RPM with minor loss to redline: Designed with Improved Throttle Response (I.T.R.) technology. *1 Intake Cam. Stage 2. Slight bottom end gain to 4800 RPM and good gains from 6500 RPM to redline. *1 Exhaust Cam. Stage 2. Slight bottom end gain to 4800 RPM and good gains from 6500 RPM to redline: Designed with Improved Throttle Response (I.T.R.) technology. *1 Intake Cam. Stage 1. Good low to mid range gains up to 9200 RPM with minor loss to redline. *1 Exhaust Cam. Stage 1. Good low to mid range gains up to 9200 RPM with minor loss to redline: Designed with Improved Throttle Response (I.T.R.) technology. *1 Intake Cam. Stage 2. Slight bottom end gain to 4800 RPM and good gains from 6500 RPM to redline. *1 Exhaust Cam. Stage 2. Slight bottom end gain to 4800 RPM and good gains from 6500 RPM to redline: Designed with Improved Throttle Response (I.T.R.) technology. *1
9.4
250°
.IN.STG1
56-C331
8.64
249°
.EX.STG1
56-C331
YZ 450F
2010 - 13
9.78
265°
.IN.STG2
56-C331
8.9
254°
.EX.STG2
56-C331
9.73 251.8°
.IN.STG1
56-C333
YZ 450F
2014 - 15
9.14 249.40°
.EX.STG1
56-C333
10.14 248.39°
.IN.STG1
56-C160
YZ 450F
2016 - 17
9.58 250.20°
.EX.STG1
56-C162
10.14 248.39°
.IN.STG1
56-C160
9.58 205.20°
.EX.STG1
56-C161
YZ 450F
2018 - 19
10.80 262.55°
.IN.STG2
56-C160
10.16 260.39°
.EX.STG2
56-C161
10.14 248.39°
.IN.STG1
56-C160
9.58 205.20°
.EX.STG1
56-C161
YZ 450FX
2016 - 19
10.80 262.55°
.IN.STG2
56-C160
10.16 260.39°
.EX.STG2
56-C161
*1: Uses stock valve springs. *2: Uses stock valve springs & rockers. *3: Shim kits available.
*4: Cam sold in front & rear sets. *5: Cam specs taken at lifter. *6: Includes adjustable cam timing sprockets.
*7: Auto-decompressor on exhaust cam. *8: Uses stock auto-decompressor mechanism.
*Please visit our website for current prices E255
E-mail: sales@oro2u.com
www.oro2u.com
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