Page 446 - 2018 Racecar Engineering Open Wheel Parts and Accessories Catalog

QUARTER MIDGET PARTS AND ACCESSORIES

DRIVETRAIN

Quarter Midget Engine And Axle Sprockets
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Part No. Description
Engine Sprockets Honda Gear Ratio Chart
TAN75233 33 Tooth Engine Spockets
TAN75234 34 Tooth 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
TAN75235 35 Tooth
TAN75236 36 Tooth 24 5.54 5.33 5.14 4.97 4.80 4.65 4.50 4.36 4.24 4.11 4.00 3.89 3.79 3.69 3.60
TAN75237 37 Tooth 25 5.77 5.56 5.36 5.17 5.00 4.84 4.69 4.55 4.41 4.29 4.17 4.05 3.95 3.85 3.75
TAN75239 39 Tooth 26 6.00 5.78 5.57 5.38 5.20 5.03 4.88 4.73 4.59 4.46 4.33 4.22 4.11 4.00 3.90
27 6.23 6.00 5.79 5.59 5.40 5.23 5.06 4.91 4.76 4.63 4.50 4.38 4.26 4.15 4.05
TAN75240 40 Tooth Axle Spockets 23 5.31 5.11 4.93 4.76 4.60 4.45 4.31 4.18 4.06 4.94 3.83 3.73 3.63 3.54 3.45
Axle Sprockets TAN75233 28 6.46 6.22 6.00 5.79 5.60 5.42 5.25 5.09 4.94 4.80 4.67 4.54 4.42 4.31 4.20
TAN75326 26 Tooth 29 6.69 6.44 6.21 6.00 5.80 5.61 5.44 5.27 5.12 4.97 4.83 4.70 4.58 4.46 4.35
TAN75327 27 Tooth 30 6.92 6.67 6.43 6.21 6.00 5.81 5.63 5.45 5.29 5.14 5.00 4.86 4.74 4.62 4.50
TAN75328 28 Tooth 31 7.15 6.89 6.64 6.41 6.20 6.00 5.81 5.64 5.47 5.31 5.17 5.03 4.89 4.77 4.65
TAN75329 29 Tooth 32 7.38 7.11 6.86 6.62 6.40 6.19 6.00 5.82 5.65 5.49 5.33 5.19 5.05 4.92 4.80
33 7.62 7.33 7.07 6.83 6.60 6.39 6.19 6.00 5.82 5.66 5.50 5.35 5.21 5.08 4.95
TAN75330 30 Tooth
34 7.85 7.56 7.29 7.03 6.80 6.58 6.38 6.18 6.00 5.83 5.67 5.51 5.37 5.23 5.10
TAN75331 31 Tooth
35 8.08 7.78 7.50 7.24 7.00 6.77 6.56 6.36 6.18 6.00 5.83 5.68 5.53 5.38 5.25
TAN75332 32 Tooth
RPM Wanted ÷ RPM Ran x Gear Ratio Ran = New Gear Ratio Needed
TAN75333 33 Tooth Example: 5480 ÷ 5220 x 4.97 = 5.22
TAN75323
RPM Wanted: 5480 Current Ratio In Car: 4.97
RPM Ran: 5220
New Gear Ratio Needed To Reach 5480: 5.22

Quarter Midget Belt Drive Systems
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HUK H_SL W\SSL`Z HYL KLZPNULK [V Ä[ H Z[HUKHYK IVS[ H_SL KYP]L O\I 0[ PZ YLJVTTLUKLK [OH[ [OL H_SL
W\SSL` IL IVS[LK KPYLJ[S` [V [OL H_SL O\I :`Z[LTZ VɈLY ZL]LYHS HK]HU[HNLZ V]LY JVTTVU JOHPU KYP]LZ!
Belt drives are lighter and can save up to 3 pounds of rotating weight. Belt drives are very reliable and forgiving.
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compared to chain drives.
Part No. Description Part No. Description
HTD Pulley For QM Engine Belt Guide For Engine Pulley Honda Gear Ratio Chart
JRPQM-6002-65* HTD Pulley 65 Tooth JRPQM-6108-65G HTD Belt Guide, 65 Tooth Engine Pulley
JRPQM-6002-58* HTD Pulley 58 Tooth JRPQM-6108-58G HTD Belt Guide, 58 Tooth
JRPQM-6002-53* HTD Pulley 53 Tooth JRPQM-6108-53G HTD Belt Guide, 53 Tooth 65 58 53 51
JRPQM-6002-51* HTD Pulley 51 Tooth JRPQM-6108-51G HTD Belt Guide, 51 Tooth 38 3.51 3.93 4.30 4.47
HTD Pulley For QM Axle HTD Drive Belts 39 3.60 4.03 4.42 4.59
JRPQM-6004-39 HTD Pulley 39 Tooth JRP640-20HD HTD Drive Belt, 20mm x 25.197" 40 3.69 4.14 4.53 4.71
JRPQM-6004-40 HTD Pulley 40 Tooth JRP656-20HD HTD Drive Belt, 20mm x 25.827" 41 3.78 4.24 4.64 4.82
JRPQM-6004-41 HTD Pulley 41 Tooth JRP680-20HD HTD Drive Belt, 20mm x 26.772" 42 3.88 4.34 4.75 4.94
JRPQM-6004-42 HTD Pulley 42 Tooth JRP696-20HD HTD Drive Belt, 20mm x 27.402" Axle Pulley 43 3.97 4.45 4.87 5.06
JRPQM-6004-43 HTD Pulley 43 Tooth JRP736-20HD HTD Drive Belt, 20mm x 28.976" 44 4.06 4.55 4.98 5.18
JRPQM-6004-44 HTD Pulley 44 Tooth JRP720-20HD HTD Drive Belt, 20mm x 28.346" 45 4.15 4.66 5.09 5.29
JRPQM-6004-45 HTD Pulley 45 Tooth JRP776-20HD HTD Drive Belt, 20mm x 30.551" 46 4.25 4.76 5.21 5.41
JRPQM-6004-46 HTD Pulley 46 Tooth JRP784-20 HTD Drive Belt, 20mm x 30.866" 4.34 4.86 5.32 5.53
JRPQM-6004-47 HTD Pulley 47 Tooth JRP800-20HD HTD Drive Belt, 20mm x 31.496" 47
JRPQM-6004-48 HTD Pulley 48 Tooth JRP840-20HD HTD Drive Belt, 20mm x 33.071" 48 4.43 4.97 5.43 5.65
JRPQM-6004-49 HTD Pulley 49 Tooth JRP880-20HD HTD Drive Belt, 20mm x 34.646" 49 4.52 5.07 5.55 5.76
JRPQM-6004-50 HTD Pulley 50 Tooth 50 4.62 5.17 5.66 5.88
* Engine pulleys require belt guides that
are sold as kit which includes two belt
guides and mounting hardware.

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