B&J Racing Products, LLC

TY250 / 350 Mono Shock


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We are experiencing price increases in material, European vendor prices, and the exchange rate. Please be aware of these changes!!! If you have any questions, please call us for current pricing!


Cylinder Porting
A performance mod for your trials machine which increases torque throughout the entire RPM range, giving your engine smoother response, more grunt, and better top end. Combine with our cylinder head mod for the ultimate trials engine!

Cylinder Head Mod
Your cylinder head is re-machined to a new combustion chamber shape and compression ratio. This gives you more torque throughout the entire RPM range.

Reed Cage Mod

Your stock reed cage is modified for more flow. Combined with our Boyesen Reeds, this mod gives a broader, smoother power band. Don't forget your spacer kit!

Use the above mods with any and all of our other engine modifications for the Ultimate Trials Engine!

Universal Fenders

Universal Plastic Fenders

Available in white, red, yellow
and powder blue (not shown)
Front $42.00
Rear $42.00

Mono Shock Stock Bracket

Front Fender Bracket
Stock fender bracket for the stock monoshock fenders.

Reproduction Fenders

Reproduction Fenders
We can now provide a reproduction front and rear fenders for your mono shocker!!!
Front    $85.00
Rear  $113.95

Alloy Fenders

Alloy Fenders
Dress up your vintage trialer!
4" Front   $118.95
5" or 6" Rear   $130.00


Tank/Seat Unit
Save your stock seat and tank! Install our tank and seat combo; sleek good looks and it doesn't dent as easily....Includes tank, seat, decals and petcock assembly. Uses your stock gas cap, or we can provide a new one!
Tank/seat unit    $600.00
New gas cap and gasket   $42.95

We highly recommend you coat your new tank with our tank sealant. This protects the tank from the additives in the US fuel supply, which do not necessarily like fiberglass. We can provide the sealant for a DIY experience or we can coat it for you.
Sealant only   $64.95
Sealant & labor  $100.00

Replacement Seat

Replacement Seat
  Replacement seat with plastic seat pan finished in red. Fits above tank/seat unit only.

TY Decals

Yamaha Decals
A veritable smorgasbord of decals to choose from! Choose the typical "block" style tank decal or the scripted "pinkies" for your mono tank/seat unit. We can also provide any of the others you see in this photo. Call for prices, but they start at $26.95/pr.

Clip-on Number Plate

Clip-on Number Plate
Manufactured of high-quality, hard plastic impervious to gasoline and chemicals.

Renthal Handlebars

Renthal Handlebars, 5" / 5.5" / 6"
High quality alloy braced 7/8" trials handle bars. Gun metal gray. Cross bar pad not included.

Renthal Crossbar Pad

Renthal cross bar pad available separately

Pro Taper Handlebars

Pro Taper Handlebars
High-strength 2014-T6 aerospace alloy rated at 70,000 psi ultimate strength. 1/4" cut guides for precise modivication. Knurled clutch side for secure grip hold. Shot-peened finish to increase fatigue life. Cold-forged crossbar with stainless hardware. Includes crossbar pad.

Renthal Grips

Renthal Grips
Renthal grips in medium compound: $13.95
Sammy Miller cross bar pad: $19.95

Bar End Plugs
Bar End Plugs

High quality fabrication. Unique design features easy on and off. Fits all bars. Looks great and protects! Available in 12mm or 14mm

Weld-On Footpeg Kit
Weld-On Folding Footpeg Kit
Footpeg Extensions
Weld-On Footpeg Extensions
Weld these manufactured-on-site extensions to your stock pegs for a wider area for your feet, more comfort, and better control (pegs not included).
Send us your stock pegs and we will weld the extensions on for an additional $30.00.
Folding Shift Levers
Folding Gear Shift Lever
Replace your stock shift lever with our folding-tip lever and have one less broken lever to worry about!
Adjustable Lever Assy
Adjustable Lever Assembly
Alloy adjustable clutch lever. Forged construction in anodized silver finish. Features 3 cable tension adjusting points; softens pull. We use it as a brake lever, too!
Universal Lever Assembly, Brake/Clutch
Universal Brake & Clutch Lever Assembly
Inexpensive replacement for your stock lever assemblies. Available in black or polished finish. Not for use with hydraulic clutch or brake systems. Available singly or in pairs.
Brake or Clutch Lever Only   $18.95
Brake & Clutch Lever, pair   $32.95

Domino Lever Assembly
Domino Lever Assembly, Brake or Clutch
The best quality guaranteed!
Brake or Clutch Lever Assy, Each   $62.00 ea
Brake and Clutch Lever Assy, Pair  $120.00 pr
Perch Only   $26.95 ea
Amal Lever Assy

Amal-Pattern Lever Assemblies
Aluminum levers; very forgiving and bend rather than break. Fit standard 7/8" bars. Available separately or in a pair.
Each  $52.00
Pair  $100.00

Domino Throttle Assembly
Domino Throttle Assembly
Slow- (black tube) or fast- (white tube) trials throttle assembly.
Black Tube  $26.95
White Tube  $28.95
Replacement cable wheel or cap
$3.95 ea
Domino Throttle, Aluminum Tube
Domino Throttle Assembly
Aluminum tube throttle assembly (fast turn).

All cables manufactured on-site,
assembled with a seven-seven strand of aircraft-grade inner cable inside a flat-wound housing with a nylon inner sheath for maximum strength and flexibility. All throttle cables require a Domino throttle assembly. Front brake cables may require your stock adjuster. Call for more info.
Throttle Cables (does not include throttle assy): $28.95
Front Brake Cables: $34.95
Clutch Cables: $34.95

Cable Luber

Cable Luber
Used to inject lubricant into the cable housing. Clamps over the housing and wire, allowing an aerosol can to be connected. Once the lube runs out the far end, the cable is lubricated.

Aluminum rear sprockets in 520 chain available in 30-74T stock for 1985 is 42T, 1986 is 35T).
Steel front sprockets, 11-17T. Stock for 1985: 12T; 1986: 10T.

Heavy-Duty Chains

Heavy-Duty 520 Chains
High-quality pins, bushings and rollers for maximum durability. Comes with one extra master link.

Additional master link

Chain Break Took


Chain Break Tool
Heat-treated, replacement tip included.

Extra tip   $2.95

TY175 Chain Tensioner

TY250/350 Mono Shock Chain Tensioner
Comes complete with spring, arm, pad, and hardware.

Silkolene Chain Lube

Chain Lube
We recommend Silkolene Chain Lube.
This is the first fully synthetic racing
chain lubricant for motorcycles. 14.5 oz

Semi-synthetic Silkolene Chain Lube.
Suitable for all types of chain including o-ring. 16 oz

Kill Button

Yamaha-Style Kill Button

NGK Spark Plugs

NGK Spark Plug
Manufacturer's recommendation: B7ES

NGK Spark Plug Cap

NGK Spark Plug Cap
The best one we've found! Waterproof, genuine NGK "L"-style cap.

Flywheel Puller

Flywheel Puller

Mono Shock Silencer
High-quality alloy rear silencer; re-packable.
Exhaust Pipe
Front Exhaust Pipe
Designed to replace original front pipe. Finished in polished chrome; includes clip.
Muffler Packing
Muffler Repacking Kit
Made of tough dura-flex hi-temp fiberglass designed specifically for exhaust use. 1"x5"x10-1/2".
Gas Cap w/Gasket

OEM Gas Cap with Gasket
Fits stock tank.

Call for price

12mm petcock

12mm Petcock Assembly
Fits Sammy Miller after-market
seat/tank unit

Boyesen Reeds

Boyesen Reeds
 Boyesen reeds offer maximum performance. The top reed opens at lower RPMs allowing for more air and fuel flow for better throttle response. The bottom reed opens at higher RPMs for maximum flow.

In-line fuel filter

In-line Fuel Filter

Motorcycle Fuel Line

Motorcycle Fuel Line
Black fuel line, compatible with a wide range of high performance additives. Extremely flexible, resists kinking.
3/16"    $1.60/ft
1/4"    $1.99/ft

PCW Air Filter

PCW Air Filter
Manufactured on-site of high-quality foam. Fits your stock cage.

Filter Oil

Don't forget your air filter oil!
Silkolene foam filter oil is a high-technology coating treatment for all foam filtrs. It contains polymeric additives which provide a hyper-tacky surface to resist sand, dust and water, but not air flow. It applies extra thin to penetrate and then sets highly-tacky.
Pint - fluid $14.50
16 oz aerosol   $9.99

Maxima FFT foam filter oil is a waterproof filter protection against dirt and fine dust. Its synthetic formula does not restrict air flow, plug filter cells, or migrate off the filter.
16 oz   $7.08
Liter   $9.81


We proudly offer both Silkolene and Maxima pre-mix, gear oil, fork oil and anything else you need! Call for pricing!


Fork Seals
$11.95 ea

Works Performance Shock

Works Performance Shock
Replacement steel-bodied shock  $290.00
Aluminum body shock   $370.00

Replacement Fork Tubes

Replacement Fork Tubes
Manufactured to fit your bike!
$295.00 / pr

Fork Oil

Maxima & Silkolene Fork Oil
Silkolene fork oil is an advanced formula front suspension fluid that reduces wear, resists corrosion and oxidation. In light, medium, and interrmediate weights.
Liter   $9.50 ea

Maxima fork oil has a high viscosity of 190+ which provides uniform fork action over a wide temperatur range. Special additives control anti-foaming, rust and corrosion. In light, medium and intermediate weights.
16 oz   $4.89 ea

Steering Stem Bearing Kit

Steering Stem Bearing Kit

Brake Shoes & Springs

EBC Brake Shoes
Front  $23.00
Rear $27.00

OEM Replacement Brake Springs
Front or Rear, ea   $6

Rim Locks

Rim Locks
1.6, 1.85, 2.15
$7.99 ea

Wheel Bearing Kit

Wheel Bearing Kit
All the bearings and seal required to refit a wheel in one convenient package.

Spoke Sets

Spoke Sets
Stainless steel pre-packaged or custom spoke sets.
Front, inner/outer   $120.00
Rear, inner/outer   $125.00


Aluminum Rims
After-market aluminum rims.
Priced per application --  Call

Trials Tires

Tire Tube

Trials Tires
IRC Trials Tires & Tubes
Tube-Type Front  $82.95
Tube-Type Rear   $110
Tubes, front or rear   $12
Tubeless Rear  $130

Michelin Trials Tires
Tube-Type Front   $112
Tube-Type Rear $183
Tubes, front or rear   $13
Tubeless Rear   $183

Dunlop 803 Trials Tires
Front   $93.37
Rear  $137.73

Please clean your engine and/or components prior to shipping.
If we have to clean the engine and/or components prior to repair or modification, there will be an additional $65/hr charge.

Engine Rebuild (plus parts/machining)
From $400
Cylinder Boring
Port Cylinder
Cylinder Head Mods
Reed Cage Mods
Crank Rebuild (plus parts)
From $90
Fork Rebuild (plus parts)
From $90
Shock Rebuild (plus parts)
From $90
TIG Welding
Carb Cleaning & Repair
From $45
Bead Blast
Powder Coat (plus supplies)
Lace & True Wheels

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