%PDF-1.4 %���� Also below are more specific number relationships. It is important to have the correct gear ratio for the tire size for proper operation of your clutch or torque converter. Go Kart Gear Ratio Tool. Input the tire diameter, highest engine rpm, number of teeth on your clutch or torque converter jack shaft and the number of teeth on the axle sprocket. 0000000835 00000 n Lower gearing equals quickness; taller … (Make sure the tire is properly inflated and in good condition.). TKM 2/ Circuit. That's the trade off. If there's no modification to the engine and you gear the kart faster (taller), you'll do so at the expense of quickness. Related Charts and Information: Karting Drive Ratio Chart Sorted by Drive Ratio. 0000001895 00000 n Fast way to determine Gear Ratio and Speed. Good "rule of thumb" calculation is to mutiply .12 by your tire diameter. Enter the values below to calculate your gear ratio Engine Number of teeth on clutch sprocket Jackshaft In Number of teeth on input sprocket Jackshaft Out Number of teeth on output sprocket Axle Number of teeth on rear axle sprocket Final Ratio Calculate ... Gear Ratio Calculator. Change Sprockets - Change Speed. 0000016997 00000 n 0000000016 00000 n If you want details of equivalent gear ratios, to those specified on this page, then click here. Use our calculator to determine the top speed and gear ratio for your tire size. In general you should have a 15 tooth clutch with a variety of rear gears ranging from 58-63 teeth for 4-cycle karts (2-cycle karts … Direct #35 to #219 pitch diameter equivalent. Racing Go Kart Gear Ratio Chart. 0000001442 00000 n 0000031796 00000 n Enter the published maximum rated sustainable RPM for the engine you are using. 2221 0 obj <> endobj To determine your gear ratio, simply divide the rear axle sprocket by the clutch sprocket, so in the case of the above example, 60 divided by 12. Mini bikes work best with a top speed of 25mph for all terrain. Fixie This guide is for modifying, designing and building custom electric; scooters, bikes, go karts, ATVs, wagons and other similar light electric vehicles. H T E E T T CKE RO P S AR RE > > > D E E P S D N E P O T E R O M > > > > > > < < < < < < N IO T A R E L E C C A R E T S A F < < < 0.00 1.00 2.00 3.00 4.00 5.00 6.00 Gear Ratio Chart *If you put on a set of tires that are 1/2” bigger in circumference that is the same as taking off 1 tooth from the axle *Adding One Tooth to a 2 cycle should give 200 rpm more *Adding One Tooth to a 4 cycle should give 100 rpm more *If you add a tooth and gain less than that, the gear … Applicable Calculator Formulae PI = 3.14159 PI * D = C (3.14159 * wheel/tire diameter = circumference of wheel and tire combo) at / ct = GR (gear ratio = axle teeth / clutch or engine teeth) 0000040297 00000 n #35 vs #219 Ratio & Pitch Diameter These charts were made to help you relate both #35, #219 and 8mm sprocket diameters to achieve the same gear ratio. 0000010967 00000 n ROTAX. 0000014742 00000 n The colors represent ideal RPM's at highway speeds (65). startxref The diameter is the radius * 2, or in this case, twice the distance from the ground to the center of the axle. The gear ratio is 5 and the potential speed is just under 13 miles per hour. endstream endobj 2245 0 obj <>/Filter/FlateDecode/Index[28 2193]/Length 65/Size 2221/Type/XRef/W[1 1 1]>>stream Running in front may require one less while if you are trying to run through the pack you miay be … %%EOF A improper gear ratio will make the clutch or belt slip and cause damage to the unit very quickly. Gear Ratio Guide. 589 6 6 22 6 44 6.67 6.78 689 700 722 7.44 767 778 789 800 8 22 8 33 8 44 8 56 867 878 8 89 241 2 45 2 55 259 2 64 268 273 2 82 286 291 2 95 300 219 Chain Gear Ratio Chart ENGINE 9 10 11 12 13 14 15 16 17 18 19 65 7.226.505.915.425.004.644.334.063.823.613.42 66 7.336.606.005.505.084.714.404.133.883.673.47 … This week we're explaining gear ratios, how to use them and when to adjust them. If you go higher than the recommended mph then the possibility of excessive slipping of the clutch or belt may cause early failure. Use this form to calculate your top-speed Engine RPM Top-rated RPM for your engine Teeth on Axle Number of teeth on axle drive sprocket Teeth on Clutch Number of teeth on clutch sprocket Diameter of Rear Wheel Height of rear wheel in inches Top Speed miles per hour Calculate Engine = Clutch Sprocket. The gear ratios of the clutch and final drive will only make the go kart faster if the engine has the power to move it faster. All of the details are based upon information that has been posted on the UK Karting Notice board, or from individuals. Click on Calculate. 3+ is green, 2-3, blue, and below 2, red. 0000039685 00000 n To determine a rear axle sprocket from a given gear ratio with a given clutch sprocket teeth number, simply multiply the first number of the ratio by the clutch sprocket teeth number (is: 5 x 12 = 60). How To Calculate your Kart's Top Speed #219 Chain Drive Components #35 Chain Drive Components The results are the circumference of the drive wheel/tire combo (in inches), gear ratio and the potential maximum speed (in MPH). Motor Types. One of the most common gear ratios for go karts is 11-12 teeth on the clutch sprocket, and 60 teeth on the axle sprocket. trailer The higher the gear ratio, the higher the top end speed; the lower the ratio, the stronger the acceleration (power). The formula is to divide the J/S In by the Engine and divide Axle by the J/S Out and multiply the two to get the final ratio. 0000039944 00000 n 0000017112 00000 n The higher the gear ratio, the higher the top end speed; the lower the ratio, the stronger the acceleration (power). Colors group similar values. The purpose of this calculator is to determine the potential speed of a go kart based on certain data. Our default is for a slow, safe junior kart. This gear ratio and tire diameter chart is meant to give you an approximation of ideal RPMs at highway speed (65 mph) for three situations: fuel economy, every day driving and increased towing power. 0000001276 00000 n Axle Sprocket Pitch Diameter Chart. To determine the gear ratio necessary for your go kart or mini bike you must know the limit of your top speed. Karting Drive Ratio Chart Arranged by Sprocket Size. 0000016770 00000 n The gear ratio is 5 and the potential speed is just under 13 miles per hour. J/S In = 20, 24 or 28 tooth input sprocket. CADETS. A very common mini bike ratio is 11-12 teeth on the clutch, and 72 teeth on the axle sprocket. h�b``c``9����*`b�6$11(f`(dbe� v�-�qƁ� ����d�00�T(������x\�Ƀ�Cr��C�ؗ�A-pbFv���3��VI3p�e6 X�� Be the first to hear about new and exciting products, special pricing and incredible deals! 0000016884 00000 n Kart-Start tracks gear ratios for LO206 for various tracks across the countries. Your gear ratio will ultimately determine how quick or how fast your kart will go. Account; 0 Item (937)-526-9544 (937)-526-9544; 0 Item; Account; Parts Breakdowns; How-To-Guides; Blog; Catalog How-To-Guides. Standard "lawnmower" engines might be as few as 2400 and high performance engines as high as 9000 RPM. 0 (.12 X 38" = 4.56) (see more formulas at bottom of page) The below table can be used to get a rough idea on gear ratios. Enter the diameter of the drive (power) wheel and tire combination. 0000009206 00000 n 2221 26 Gear Ratio Chart 9: 10: 11: 12: 13: 14: 15: 16: 17: 18: 19: 20: 53: 5.89: 5.30: 4.82: 4.42: 4.08: 3.79: 3.53: 3.31: 3.12: 2.94: 2.79: 2.65 Chain ⚙ Sprocket Calculator Chain Length Sprocket Centers RPM & Gear Ratio Chain Speeds Link Pitch (inches) or #25 0.25" ~ 6.35mm #35 0.375" ~ 9.53mm #41 0.5" ~ 12.7mm #50 0.625" ~ 15.88mm #60 0.75" ~ 19.05mm #80 1" ~ 25.4mm #100 1.25" ~ 31.75mm #120 1.5" ~ 38.1mm #140 1.75" ~ 44.45mm #160 2" ~ 50.8mm For mini bikes 35mph is the top speed when using a torque converter. 0000032290 00000 n <]/Prev 299931/XRefStm 1057>> The results are the circumference of the drive wheel/tire combo (in inches), gear ratio and the potential maximum speed (in MPH). The ratio of those numbers yields the best power (faster acceleration) or the best high end speed, or a compromise of both. To find the gear ratio, simply divide the axle teeth by the clutch teeth. When using a torque converter with a go kart you may go as high as 45mph on flat terrain and 35mph on hilly terrain. Lowering the ratio increases top end speed - Increasing the ratio increases acceleration and bottom end power. SRS Shifter Kart Gear Ratios Honda CR125 Shifter Kart Engines by SRS Gear Ratios for your shifter kart, sorted by gear size or overall gear ratio. 0000002391 00000 n This chart provides values that represent a 1:1 ratio on a manual transmission. 0000040807 00000 n There are two types of electric motors; standard motors and gear motors. 0000013044 00000 n When using a clutch to drive your go kart the top speed on flat terrain is 35mph, if the terrain is hilly or the weight of the driver is high the top speed should be 25mph. Enter the number of teeth or sprocket splines on the axle (higher number, probably 50 to 70) and on the clutch or engine (smaller number, probably 8 to 15). #35 #219 15 tooth = 18 tooth 16 tooth = 19, 20 tooth 17 tooth = 20, 21 tooth 18 tooth = 22 tooth 0000001057 00000 n Our default is for a slow, safe junior kart. 0000031543 00000 n Looking for the mph gear ratio for your go-kart, mini bike or racing go kart? 2246 0 obj <>stream This converter requires the use of Javascript enabled and capable browsers. J/S Out = 14 thru 17 or 20 tooth output sprocket. Changing the tire size will dramatically change the top speed so if you are going to a larger tire size you must correct the gear ratio for proper operation. 0000003963 00000 n Our default is for a slow, safe junior kart. Click on Calculate. This gives new racers a place to start. 0000012671 00000 n Gear Ratio & Tire Size Chart. xref Calculators. 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