Specialty parts for motorized bicycles, Please see our new website, with a better selection of chain tensioner parts! MBRebel.com click here http://mbrebel.com/product-category/bike-motor-parts/chain-tensioners-idler/
Pound flat the straps of your chain tensioners for more chainstay grabbing power,upgrade bolts to GRADE 8.
The chain tensioner acts as both a tensioner and a chain guide, guiding the chain onto the sprocket. Also stops chain slap against tires. Install the chain tensioner on the left side of the chain stay. Upon initial installation drop the tensioner wheel to its lowest position. Adjust chain tensioner arm to pull up most of the slack in the chain. You will need to keep at least ½ inch of slack in the chain at all times. Before you initially start the motorized bicycle make sure that the chain tensioner is securely fastened. The Arch tensioner design is very secure and spans the frame strengthening the frame.
CHAIN TENSIONER WHEEL WITH ALLEN AXLE, Bearing white idler wheel, replacement for a worn out wheel. Great quality bearing type with aluminum spacer, washers, nut, and upgraded HEX HEAD 8mm bolt. $10.00
12 1/2"INCH ARCH CHAIN TENSIONER PART, our largest and most heavy duty chain tensioner arch. 5/8ths of an inch thick metal,1 inch wide, grove 5/8ths.Designed heavy duty for 4 stroke motorized bicycles or 2 stroke motorized bicycles.U-bolt,weld or braze this 12 1/2 inch long arch part to your frame. Lazer Cut in the U.S.A. American designed and made. Weight 12.8oz.$14.99
12 1/2"INCH ARCH CHAIN TENSIONER KIT,spans across the the rear frame chainstays. Kit includes 12 1/2"Arch Part weldable steel,White bearing tensioner wheel,¾ U Clamp,1 1/8 U Clamp,5/16 X2inch” Socket Head Bolt,5/16 Square Head Nut,5/16 Flange Nut,and 5/16th spacer. Our largest and most heavy duty chain tensioner arch. 5/8ths of an inch thick metal,1 inch wide, grove 5/8ths. Designed heavy duty for 4 stroke motorized bicycles or 2 stroke motorized bicycles.
Infinitely adjustable with spacers,to any bike frame. Lazer Cut in the U.S.A. American designed and made. The kits are designed to fit most bikes additional or different size U clamps can be found at your local hardware store.
Last Picture painted and installed, bike not included.$34.00
SPRING LOADED IDLER CHAIN TENSIONER,The Spring Loaded Idler Pulley will maintain consistent pressure on the chain to maximize performance. It will reduce stress on the chain and keep a consistent tension through any ride.Fulcrum has a bearing at the pivot,and bearing in white idler wheel. This aftermarket performance upgrade comes with all the hardware for installation. Compatible with all 2-stroke 48cc/50cc/66cc/80cc engine kits as well as 4-stroke 50cc engine kits.$24.99 In Stock, Ready to Ship!!!!!
BEARING CHAIN TENSIONER, with GRADE 8 American bolts and nuts to replace the Chinese butter bolts. Bearing in white wheel.If you pound the straps to a slightly flatter shape the metal straps will grab a smaller diameter chainstay tighter.$17.00
DOUBLE STRAP CHAIN TENSIONER, shorter chain tensioner with 2 straps for more chainstay grabbing power.Z809 Bearing in white wheel held in with snap ring.If you pound the straps to a slightly flatter shape the metal straps will grab a smaller diameter chainstay tighter.$17.00
10"INCH ARCH CHAIN TENSIONER KIT,spans across the the rear frame chainstays.Kit includes 10"Arch Part weldable steel,White bearing tensioner wheel,¾ U Clamp,1 1/8 U Clamp,5/16 X2inch” Socket Head Bolt,2 5/16 Nyloc nuts,and 5/16th spacer,4 grade 8 washers. The kits are designed to fit most bikes additional or different size U clamps can be found at your local hardware store. Lazer Cut in the U.S.A. American designed and made.
Infinitely adjustable with spacers,to any bike frame.$33.00
CHAIN TENSIONER WHEEL WITH ALLEN AXLE AND SNAP RING, Bearing white idler wheel, replacement for a worn out wheel.Great quality bearing type with snap ring,spacer,washer,nut,and upgraded HEX HEAD 5/16 bolt. $10.00
10 TOOTH ALUMINUM IDLER WHEEL, idler/tensioner Precision bearing sprocket, with stainless washer, spacer, bolt and nut. These can be used as a replacement to your stock nylon wheel. CNC milled in the U.S.A. American designed and made. $22.49
10"INCH ARCH TENSIONER PART WELDABLE STEEL,U-bolt,weld or braze this 10 inch long arch part to your frame.Weight 5.8oz. Lazer Cut in the U.S.A. American designed and made. $11.49
9 1/2"INCH ARCH TENSIONER PART WELDABLE STEEL,U-bolt,weld or braze this 9 1/2" inch long arch part to your frame.Weight 5oz. Lazer Cut in the U.S.A. American designed and made. $13.00
KMC UNDUSTRIAL 415 SPEED CHAIN, upgraded but not as thick as the thick kit chains. Great when there are tire clearance issues. Pin Length 10.70mm,Link Height 9.83mm, 1/2 X 3/16ths. Works well on Maniac Mechanic Sprockets. $13.49
Pitch - P 0.5 in
Pin Length 0.421in 10.73mm
Pin Diameter - D 0.143in 3.65mm
Roller Width - W 0.191in 4.89mm
Roller Diameter - R 0.304in 7.71mm
Plate Height - H 0.387in 9.86mm
Plate Thickness - T 0.044in 1.07mm
Overall Width - F 0.209in
Overall Width - G 0.213in
Average Weight Per Foot 0.19lb
Average Ultimate Strength 1,700lb
Finish Carbon Steel
415 CHAIN WITH MASTER LINK,Precision Super duty 415 chain.112 link,140cm/55inch length.Fits counter shaft sprocket up to 4mm wide. Includes master link and keeper.Pin Length 12.60mm,link height 11.05mm.Standard heavy duty chain for bicycle engines.This is the typical stock chain found in most non Grubee kits,Grubee kits come with a very poor 410chain that should be upgraded to this chain, or the KMC 415 INDUSTRIAL SPEED CHAIN. $17.00 only $8.79 shipping Total $25.79
ANSI No. 415
Pitch - P 0.5 in
Pin Length 0.491in 12.70mm
Pin Diameter - D 0.154in 3.57mm
Roller Width - W 0.1.95in 4.88mm
Roller Diameter - R 0.304in 7.74mm
Plate Height - H 0.40in 10.12mm
Plate Thickness - T 0.060in 1.53mm
Overall Width - F 0.210in
Overall Width - G 0.230in
Average Weight Per Foot 0.23lb
Average Ultimate Strength 2,000lb
Finish Carbon Steel
Length 110 Links 53 1/2 Inches Long
415 MASTER LINK,with keeper C clip. For stock Kit 415 chain. $3.00
ANSI No. 415
Pitch - P 0.5 in
Pin Length 0.5700in 14.50mm
Pin Diameter - D 0.154in 3.93mm
Plate Height - H 0.403in
Plate Thickness - T 0.058in
Overall Width - F 0.223in
Overall Width - G 0.314in
Average Weight Per Foot 0.24lb
Average Ultimate Strength 1,600lb
Finish Carbon Steel
5"INCH 4 BOLT CHAIN TENSIONER HARDWARE,parts can be used for mounting motors or as mounting straps or brackets for other parts. $5.00
415 CHAIN 1/2 LINK,for standard kit 415 chains.
24mm O.D.X 5/16 BORE BEARING
Replaces 9mm bore bearing. 9mm allen bolts dont exsist so switch the bearing on your unuseable white chain tensioner wheel to this bearing and you can use a 5/16inch or 8mm allen head bolt! Change quantity after clicking on the Buy It Now button and order several for the same shipping price. $1.70 each
To many parts to have them all on this website. Call if you do not see what you are looking for. 414-732-0017 Special orders Welcome for hard to find parts!!
NEW Parts available from Planet Bike, Wald and SUGINO cranks what crankset are you looking for or a part from PlanetBike at low discount prices, just inquire. Lynn 414-732-0017
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