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Author Topic: Pulley Options  (Read 530 times)

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Offline lunkhead

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Pulley Options
« on: December 07, 2020, 08:14:30 pm »
PART NUMBERS
30T:  5S7-17651-00-00
31T:  27D-17651-00-00
32T:  5PX-17651-00-00
66T:  5C7-25466-01-00
70T:  1TP-25470-00-00

VEHICLE SPEED
30:70   INCREASE   (ADJUST AXLE)
31:70   +3.3333%    ( -7mm)
30:66   +6.0606%    (+28mm)
32:70   +6.6667%    ( -14mm)
31:66   +9.596%      (+21mm)
32:66   +13.1313%  (+14mm)

ENGINE SPEED
30:70   DECREASE  (FACTOR)
31:70    -3.2258%    (0.9677419355)
30:66    -5.7143%    (0.9428571429)
32:70    -6.25%        (0.9375)
31:66    -8.7558%    (0.9124423963)
32:66    -11.6071%  (0.8839285714)

<0.6% difference between 30:66 & 32:70

ENGINE RPM (5TH GEAR)
MPH 30:70 31:70 32:70 31:66 32:66
 25     1344  1300  1260  1226  1188
 30     1613  1560  1512  1471  1426
 35     1881  1821  1764  1716  1663
 40     2150  2081  2016  1962  1900
 45     2419  2431  2268  2207  2138
 50     2688  2601  2520  2452  2376
 55     2956  2861  2772  2697  2613
 60     3225  3121  3024  2943  2851
 65     3494  3381  3276  3188  3088
 70     3763  3641  3528  3433  3326
 75     4031  3901  3780  3678  3563
 80     4300  4161  4032  3924  3801
 85     4569  4422  4283  4169  4039
 90     4838  4682  4535  4414  4276
 95     5106  4942  4787  4659  4514
100    5375  5202  5049  4904  4751
105    5644  5462  5291  5150  4989
110    5913  5722  5543  5395  5227
115    6181  5982  5795  5640  5464
120    6450  6242  6047  5885  5701
125    6719  6502  6299  6130  5939
130    6988  6762  6551  6376  6177
135    7256  7023  6803  6621  6415
140    7525  7283  7055  6866  6652
145    7794  7543  7306  7111  6889
150    8063  7803  7558  7356  7126

ENGINE RPM (4TH GEAR)
MPH 30:70 31:70 32:70 31:66 32:66
 20     1299  1257  1218  1185  1148
 25     1624  1572  1522  1482  1435
 30     1948  1886  1826  1778  1722
 35     2273  2200  2131  2074  2009
 40     2598  2514  2436  2371  2296
 45     2923  2829  2740  2667  2583
 50     3247  3143  3044  2963  2870
 55     3572  3457  3349  3259  3157
 60     3896  3771  3653  3555  3445
 65     4221  4085  3957  3851  3731
 70     4546  4399  4262  4148  4018
 75     4871  4714  4567  4445  4306
 80     5196  5028  4871  4741  4593
 85     5520  5342  5175  5037  4880
 90     5845  5656  5480  5333  5167
 95     6170  5971  5784  5630  5454
100    6494  6285  6088  5926  5740
105    6819  6599  6393  6222  6028
110    7144  6914  6698  6518  6315
115    7469  7228  7002  6815  6602
120    7793  7542  7306  7111  6889
125    8118  7856  7611  7407  7176

NOTES
1. Speed sensor must be moved to fit 32T pulley.
2. Vehicle speed will be 6% higher than indicated with 66T pulley.
« Last Edit: December 08, 2020, 01:30:11 am by lunkhead »


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Offline Sdaniels

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Re: Pulley Options
« Reply #1 on: January 05, 2021, 11:21:51 am »
What is stock tooth count, 30 front, 70 rear?
2015 C-spec

Offline lunkhead

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Re: Pulley Options
« Reply #2 on: January 05, 2021, 01:27:40 pm »
Yes.

Also, Yamaha has new 32T(?) pulley not listed above. It's wider at the splines so no shimming and better wear characteristics is expected. I ordered one a couple weeks ago and will update when it gets here. I'm not 100% sure it'll fit or has 32T so dont take my word for it just yet. Part # is 2DF-17651-00-00.
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Offline AlanSmith7

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Re: Pulley Options
« Reply #3 on: January 05, 2021, 01:33:32 pm »
They will also fit for an XVS950 Bolt. Bolt has the 30 tooth.

Offline YAMAHAULER1

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Re: Pulley Options
« Reply #4 on: January 05, 2021, 09:03:24 pm »
I have installed the 31T front and works but from my observation & measurements, determination is (would have insufficient clearance) for speed sensor with a 32T.

Offline YAMAHAULER1

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Re: Pulley Options
« Reply #5 on: January 05, 2021, 09:12:15 pm »
Question for lunkhead. Do you know that a 5C7 rear pulley will actually fit a Bolt? My research shows that fits a Raider (much wider wheel) with different and some similar parts along the axle.

Offline lunkhead

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Re: Pulley Options
« Reply #6 on: January 06, 2021, 05:19:14 am »
I'm only going by what I read others have done. I'm not sure what belt widths are used on all the biggest models so I can't say if people are using a wider pulley along with a stock narrow pulley to keep the belt somewhat centered or even if they paid attention to alignment. I wouldn't do a 66T without knowing more. Modifying the the speed sensor mount for a 32T looks easy.
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Offline YAMAHAULER1

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Re: Pulley Options
« Reply #7 on: January 06, 2021, 03:51:05 pm »
Just researched 2DF-17651-00 pulley fits XV19 Star Eluder and Venture models, both have middle drive gear assemblies & right side drive?

Offline lunkhead

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Re: Pulley Options
« Reply #8 on: January 06, 2021, 09:50:42 pm »
Yes. And here's the older Yamaha front pulleys that might have the wrong splines or be too wide. I think the 33T fits but is wide. :
4WM-17651-00-00 33T 1999 XV16
5VN-17651-00-00 ?T 2004 XV17
1D7-17651-00-00 ?T 2006 XV19
3D8-17651-00-00 30T 2007 XV13
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