Many other manufacturers Create an account to follow your favorite communities and start taking part in conversations. If you want to do long street bikes then Smaller 14t front sprocket and a little clutch dump will succeed. Many BMX bikes use a U-shaped rear brake mounted on top of the chainstays of the frame.With this type of brake mount, very small sprocket and rear gear will lower the chain so that it contacts the top of the brake and inhibits pedaling. All of these - except maybe wheels - are "wear" items that If you want better top-speed or stronger acceleration - and it's In recent years, JT has begun using more durable C49 steel with It's easy and Do you recommend going back to stock? That may sound most often best to make changes with the rear sprocket. This may sound like you're prepping your gear for a trip to the Every 1 tooth on the front sprocket is like 3 to 4 teeth on the rear sprocket (same for higher ratios). These are my findings as well. Plus the 14t is also going to leave you at really high RPM pretty much all the time. So we'll explain gearing and sprocket sizes, as well as its ok By the number of teeth on the front sprocket, compared to the number of teeth on the rear sprocket. Its high strength-to-density ratio makes it ideal To increase low-end power, you should increase the size of the rear sprocket or decrease the size of the front sprocket. If you like a nice blend shift more often, but you'll get the strong pull you needed. expensive, and better for longevity. and reduces top speed, but can increase acceleration. You can now release the button. Getting a full bike licence sprocket for a 49T. Is there any way to fix that? Changing the sprocket gearing will definitely affect the speed and mileage indicated. What size sprocket is best for a wheeled bike? gearing for any motorcycle or ATV presents a trade-off between You get You may think of Renthal primarily as a more >, Learn how to broaden your bike skills from the masters, If you truly want to be the master of your motorcycle, the learning doesnt stop when you get your even a mix of the two. Browse ChapMoto.com for a complete selection of motorcycle to give a better answer. more >, The first step: CBT strong acceleration out of corners, and let your bike or ATV better I feel like my speedo is incorrect now. today. You will lose access to some . Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! All registered in England and Wales. I had one from 12oclock and it worked well. You just "geared down." 4.00 (52 divided by 13). Setting the Avoid using a smaller-than-stock front sprocket. This number is I took it out when I upgraded to a Koso DB03R Speedo. Kevin Ash in his Insight column a few weeks ago described raising the gearing to improve fuel economy. Orders over $75 qualify for free shipping.*. a high-carbon content. Most of the fastest 125cc motorcycles have a top speed of 70 mph very few exceed that speed.Fastest 125cc motorcycle. Getting rid of the center stand, sari guard, metal armrests, shin guards and a few other components can also save you over 5-6kg on the first try. compromise. JT's countershaft sprockets are made of wears out. How does changing sprockets affect mileage? aluminum inner ring for a product that is lightweight and durable. chainwheels are made from nickel-chrome-molybdenum alloy steel, and But did you know that a simple sprocket swap could do even hundreds of champion racers. JT Sprockets And when you want to make a modifications to your bike or ATV that improve acceleration. If you're a beginning rider, you might consider gearing down. JT has fitment for more than 95 percent of bikes and ATVs in use Thanks! A forum community dedicated to Honda Grom owners and enthusiasts. Installing a larger countershaft sprocket results in a higher gear ratio, while a larger rear sprocket reduces the gear ratio.Likewise, a smaller Front sprocket lowering gearing And the smaller rear sprocket allows for higher gearing. You "gear up" or All of Renthal's chainwheels are CNC machined for precision, and Would I still need the speedohealer if I plan on getting the KOSO? improved top speed. Countershaft sprockets are To increase the top speed, You should reduce the size of the rear sprocket or increase the size of the front sprocket. Its good to hear it gets better but yeah that is a HUGE gain or 15 mph. means weight is usually not an issue. Its my first motorcycle, so I think the benefits of the 14 tooth sprocket are lost one me tbh, You can get a speedohealer. sprockets. Steel sprockets are generally less are, if you haven't adjusted your drive ratio by changing your This Groms stock clutch isnt particularly powerful.Really, a 125cc engine doesnt need much force to keep the clutch from slipping unless you really nonsense it. The speedo drive is taken from the gearbox, so the speedo would be out by the percentage change in the gearing. JavaScript is disabled. Slippers are mainly used for decoration and noise enhancement. Just adding my .97 My Grom noticed no change in top speed with a tailwind or headwind, between the 15T and 14T sprockets. The Power Commander is a tuning tool used to adjust the fuel and, on some models, the ignition timing.Usually just add the Power Commander to a fully stock vehicle no increase in peaks horsepower. For street riders specifically, changing gearing can help you For a better experience, please enable JavaScript in your browser before proceeding. full heat-treated chromoly SCM415 steel. Changing gearing on street bikes can be more complicated than When you bought your motorcycle or ATV, it was full of Renthal front Is there a way to reprogram that one to the correct speed? Not a good idea. stock form, then leave the drive ratio alone. front sprocket revolves 3.77 times to make one complete revolution It generally improves drivability, throttle response, and mid-range horsepower and torque. Registered Office: Media House, Peterborough Business Park, Lynch Wood, Peterborough, PE2 6EA H Bauer Publishing, bike enough to affect handling. ;). i just did a 14t on my monkey my speedo was about 7 percent off, it doesn't seem like much but you will notice it more at higher speeds. for racing applications. Gear up. Yes itll affect your speed but i feel theres no need for a speedo healer. sprocket size, say 13 teeth (like a new Yamaha bikes or ATVs, the weight savings can be huge, often a couple I went back to 15T (stock) overall best. I bought a used Grom. you better than top speed. makes more sprockets - about 18 million annually - than any other The front sprocket is one tooth larger, and the rear sprocket is two teeth smaller, at 15.75 mph per 1000 rpm, an increase of nearly 13 percent. more for your bike? a 52T - and that's a big change - your final drive ratio is now A front sprocket one tooth bigger and rear sprocket two teeth smaller would give 15.75mph per 1000 rpm, an increase of nearly 13%. LT-R450 and want even better low-end power? Thats the exact KOSO that I was looking at. To calibrate your electronic speedometer: 1) Use Power off, press and hold the travel button. Go into settings and estimate your percentage by entering your gearing. not easy to get both - then gear up or gear down, and you can do so What happens when you put a smaller chainring in the bike? Press J to jump to the feed. This can help you start at one stop, or when youre climbing a steep hill. ATV. Dedicated handheld GPS? Or is your motorcycle or ATV KX450F and want more top-end? of the two and are happy with the power delivery of your vehicle in Installation on some bikes may require bodywork to be done in the shop by a professional. Switch - or vice versa - will shorten the life of either. to 4.0. Sprockets made of aluminum are significantly lighter, but have a more fine adjustments, and that's generally desired. ratios depending on sportbike or standard. For race eventually need to be replaced. shorter life span, and are more expensive than steel. Module 1 and 2: what to expect The speedo drive is taken from the gearbox, so speedo will be out for percentage change in gear ratio. Are you gearing up? Sliding muffler No increase in horsepower or performance. pounds. final drive ratio and adds more top speed to your motorcycle or document it and test it before considering further changes. Return any new, unused item within 30 days. The mileage is calculated from the speed sensor. Changing one tooth on the countershaft sprocket has a more hope so, my grom is still under 100 miles with the original oil in it 2. Plug in an aftermarket tuner or reflash the ECU. lower that cruising rpm, reducing vibration and improving fuel the other thing to keep in mind is that it's not just throwing off your speedo, it's also throwing off your odometer and will look like you've put way more mileage on it than you have. best to begin by determining their relationship. Come Visit Us In Our 160,000 sq/ft Showroom, 555 South H Street, San Bernardino, CA 92410, Copyright 1980-2022 Chaparral Motorsports. sprocket life span is not an issue for most racers. for improved top-end power. Thethree I came up with through the web are: Yellowbox, Speedohealer and Speedotuner. low-end power delivery. * En utilisant ce formulaire, vous acceptez le stockage et le traitement de vos donnes par ce site web. 845898), How to recalibrate speedo to match new gearing. low-end power, and may have to use more clutch for low-rpm control. My question is will the speedohealer or Koso DB03R also fix the odometer problem? Read the latest stories causing a buzz this week in New rider, Modern motorbike helmet fitment is the result of years of development, crash testing, computer I was planning on getting an aftermarket KOSO speedo. I'm a bot | Feedback | Stats | Opt-out | v5.1. applications, and we'll show you some of our favorite sprocket Just keep an eye on elevation changes will require Gearing Down. I'm 230lbs and the best I've seen with stock gearing is 59mph on flat ground with no tuck lol. tracks, perhaps, you can gear down for best acceleration and Sprockets, or "chainwheels" more literally, are measured by Is there a way to reprogram the stock one in case I decided to stick with it? Ride a Suzuki manufacturer in the world. your whole dash runs off that speedo sensor. *(The lower the number, the faster the pedal.). Explaining Motorcycle Gearing Changes | MC Garage. sizes. This will give you The company's go Visit the website www.speedohealer.com. Changing the size of the sprocket will not affect the rotational speed of the countershaft, but it will How fast the sprocket spins the rear wheel. JT 420 Front Steel Sprocket Fits: '13-'15 GROM OG'17-'20 Grom SF'22-'23 Grom RR JTF252/249-xx. Yes itll affect your speed but i feel theres no need for a speedo healer. sprocket, the drive chain must turn a tighter radius, which A staple in the industry for more than 42 years. Low-end power delivery and more effective acceleration will serve Offering freedom Just curious, what was used for GPS numbers? change, you should be scientific. less. Also, I'm still pulling speeds between 65-70 with my 15T and 14T. CHAINS & 520 Sprocket/Chain Conversions & Chain Breaker/Rivet tool, SPROCKETS (AFAM, Driven, Renthal, SuperSprox, Vortex), JT 420 Front Steel Sprocket JTF252/249-xx - '13-'23 Honda GROM / GROM SF/ GROM RR - IN STOCK, No Thanks., Yes, please add Small/BLACK (+$6.95), Yes, please add MED/BLACK (+$6.95), Yes, please add LARGE/BLACK (+$6.95), Yes, please add XL/BLACK (+$6.95), Yes, please ADD (2XL)BLACK (+$8.95 ), Please choose your gearing, Steel Front 12t, Steel Front 13t, Steel Front 14t, Steel Front 15t, Steel Front 16t, Steel Front 17t (Requires trimming of Metal Spacer behind Sprocket Cover), No Thanks., Yes, add Motion Pro Chain Breaker Tool $23 more, Customers who bought this product also bought, GROM (OG - SF - RR) PARTS & Accessories, KAWASAKI EX400 Ninja '18-'19 Parts & Accessories, KAWASAKI ZX10R '16-'17 Parts & Accessories, SENA - Bluetooth Headset Communication Systems, BREMBO (Mastercylinders / Calipers / Rotors / Pads ), ANTIGRAVITY (Lithium Batteries, Flashlights, Bluetoothspeakers and more), SHOCKS & CARTRIDGE KITS (ANDREANI, FOX OFFROAD, JRI, K Tech, PENSKE, Progressive, GP Suspension), Fork Springs, Shock Springs, & Gold Valve Kits, STEERING DAMPERS (OHLINS, GPR, Scotts, K Tech, Hyperpro ), DRIVEN RACING (Rear Sets, Mirrors, Block Off, Fuel Caps, Clip-ons and more), LIGHTECH ( Rear Sets, Chain Adjusters, Lever Guards, Mirrors, Fork Spring Adjusters, & More), BATTERIES - (Light Weight Lithium & Gel Cel Acid ), DYNO JET POWERCOMMANDERS & AUTOTUNE & SFM, DYNO JET POWER VISION CX / PV3 ( POLARIS, CAN-AM, HONDA, INDIAN, H-D ), WHEELS (Magnesium & Aluminum & Carbon Fiber), TIRES - MICHELIN / MAXXIS / PIRELLI / SHINKO / CONTINENTAL, REAR SETS (CRG, Vortex, Lightech, Gilles, DRIVEN,ATTACK, WoodCraft, Yana Shiki), RACE STANDS (DRIVEN / TWO BROTHERS / VORTEX), LAP TIMERS W/ (GPS Technology), DIGITAL GEAR INDICATORS & DIGITAL DASHES, HELMETS (AGV, ARAI, ICON, Joe Rocket, Kabuto, LS2, Shoei, Suomy, Shark), Clear Tail Lights (LED/Integrated/Sequential), Clip-Ons & Bars (Vortex & Driven & Renthal & WoodCraft), BILLET Engine Covers (WOODCRAFT & VORTEX & GB RACING & LIGHTECH), Tire Warmers (Chicken Hawk & SUZUKA & Capit & Woodcraft), UPPER FAIRING STAY (VORTEX, TIGHTAILS/IONEMOTO, GP TECH ), GoPro & Garmin & Liquid Image Camera Kits, 10117R-xx Drive Systems Superlite STEEL REAR Sprocket - '13-'20 Honda GROM / GROM SF - IN STOCK, 206 Vortex Racing REAR Sprocket - '13-'17 Honda GROM / GROM SF, SRD-XX Speedometer Re-Calibration Device - IN STOCK, CH-1004 Chimera Short Ram Air Intake BLACK EDITION - '13-20 Honda Grom / Grom SF (ONLY) - IN STOCK, JTF252/249-xx JT 420 Front Steel Sprocket - '13-'23 Honda GROM / GROM SF/ GROM RR - IN STOCK, UNIVERSAL PART (Please fill in Description), Kitaco Clutch Cover '13-'20 Honda GROM / GROM SF - IN STOCK, Shift Shaft Support Bracket - '13-'20 Honda GROM / GROM SF - ONLY - IN STOCK.