Xcel Gearing - Xcel Chassis

Introduction:

Below are the base ratios for both motor programs.
The gear selections are based on an average track and may not fit all situations. You can help. If you have a base setup for either motor on a track not listed, share it. ANY track that you have turned laps on is welcome. Just send an email to webmaster@xcelchassis.net

TIP: XCEL MODIFIED CHAIN TENSION ADVICE Since you are changing gears, you may want to see how to tension that chain. Link is a 2-minute video on that topic.

If you have a different size front gear, the ratio chart will help you convert to the correct rear gear recommendation to your front gear size.

Look up the gear that is listed on the first chart. Use it to find the closest match to your front gear and what the rear gear would be.

Let’s use Lindas Speedway for an example:

Lindas Speedway on the chart shows a 13-46 configuration in 3rd gear, which if you look up on the ratio chart is: 11.91 (3rd gear)

If you have a 12-tooth sprocket on the front, you will look for the 12-XX gear by comparing the chart for the closest thing to an 11.91 ratio.

For the 12’s sprocket chart, 11.84 is the closest and it appears twice.

First is an 12-42 in third gear and a 12-48 in forth gear. What you choose is based on what you have.

In addition to using this for changing the front gear, you could also use it to tweak your gearing for a specific track.

Suzuki
Yamaha

Suzuki Engine Program Gear Chart

Track Name	Front Gear		Rear Gear	Motor Gear
Action Track (Kutztown)	13	–	46	3rd
BAPS Speedway	13	–	46	4th
Big Diamond Speedway	13	–	46	4th
Bloomsburg Fairgrounds
Bridgeport (Big Track)	13	–	46	4th
Bridgeport (Infield Track)	13	–	47	3rd
Grandview Speedway	12	–	44	4th
Hamlin	12	–	47	3rd
Lincoln Speedway (1)	13	–	46	4th
Lincoln Speedway (2)	14	–	44	3rd
Lindas Speedway	13	–	46	3rd
Penn Can	13	–	45	3rd
Potomac	14	–	44	3rd
Thunder Mountain	13	–	48	3rd
Winchester	14	–	44	3rd

Suzuki

Suzuki Engine Program Gear Ratios

Front Gear	Back Gear	2nd	3rd	4th
12	40	13.50	11.28	9.87
12	41	13.84	11.56	10.12
12	42	14.18	11.84	10.36
12	43	14.51	12.12	10.61
12	44	14.85	12.41	10.86
12	45	15.19	12.69	11.10
12	46	15.33	12.97	11.35
12	47	15.87	13.25	11.60
12	48	16.2	13.53	11.84
12	49	16.54	13.82	12.02
12	50	17.55	14.66	12.83

13	40	12.46	10.41	9.11
13	41	12.78	10.67	9.34
13	42	13.09	10.93	9.57
13	43	13.40	11.19	9.79
13	44	13.71	11.45	10.02
13	45	14.02	11.71	10.25
13	46	14.33	11.91	10.48
13	47	14.64	12.23	10.71
13	48	14.96	12.49	10.93
13	49	15.27	12.75	11.16
13	50	15.58	13.01	11.39
13	51	15.89	13.27	11.62
13	52	16.20	13.53	11.84

14	40	11.57	9.67	8.46
14	41	11.86	9.90	8.67
14	42	12.15	10.15	8.88
14	43	12.44	10.39	9.09
14	44	12.73	10.63	9.31
14	45	13.02	10.88	9.52
14	46	13.31	11.12	9.73
14	47	13.60	11.36	9.94
14	48	13.89	11.60	10.15
14	49	14.18	11.84	10.36
14	50	14.47	12.08	10.58
14	51	14.76	12.33	10.79
14	52	15.05	12.57	11.00

Gearing Ratios Suzuki

Yamaha Engine Program Gear Chart

FYI: The Yamaha motor has been demonstration more pull (vs. more rpm on the Suzuki) and it is recommended that you use larger gear combinations, if possible, to handle the strain.

Track Name	Front Gear		Rear Gear	Motor Gear
Action Track (Kutztown)	16	–	47	3rd
BAPS Speedway	16	–	44/45	4th
Big Diamond Speedway	16	–	46	4th
Bloomsburg Fairgrounds
Bridgeport (Big Track)
Bridgeport (Infield Track)	16	–	47	3rd
Grandview Speedway	16	–	46	4th
Hamlin	16	–	46	3rd
Lincoln Speedway	16	–	45/46	3rd
Lindas Speedway	16	–	51	4th
Penn Can

Yamaha

Front Gear	Back Gear	2nd Gear	3rd Gear	4th Gear	5th Gear
15	44	9.861	7.983	6.809	5.868
15	45	10.086	8.165	6.964	6.001
15	46	10.311	8.346	7.120	6.133
15	47	10.533	8.527	7.273	6.768
15	48	10.758	8.709	7.429	6.401
15	49	10.984	8.890	7.584	6.535
15	50	11.206	9.072	7.737	6.668
15	51	11.408	9.253	7.892	6.801
15	52	11.656	9.435	8.049	6.936
15	53	11.878	9.615	8.201	7.067
15	54	12.103	9.798	8.351	7.201

16	44	9.246	7.484	6.384	5.50
16	45	9.457	7.654	6.530	5.626
16	46	9.666	7.824	6.674	5.750
16	47	9.878	7.995	6.820	5.876
16	48	10.086	8.165	6.964	6.000
16	49	10.298	8.335	7.111	6.126
16	50	10.506	8.505	7.255	6.250
16	51	10.718	8.675	7.401	6.376
16	52	10.927	8.845	7.545	6.500
16	53	11.138	9.005	7.684	6.627
16	54	11.363	9.198	7.846	6.760

Gearing Ratios Yamaha