B&J Racing Products, LLC

TY250 1974-1977

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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 Plastic Fenders

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

B&J's Front Fender Brackets

Front Fender Bracket
NEW!!! B&J -manufactured aluminum front fender brackets, available in your choice of finish. Made from high-quality aluminum, has a significant weight difference over the steel chromed version. For use with our after-market fenders.
Front Fender BracketBrushed raw aluminum finish  $80.00
Steel chromed Sammy Miller bracket  $85.95

Mounting hardware kit  $19.95

Reproduction Rear Fender

Reproduction Rear Fender
Manufactured of an extremely pliable, flexible plastic that absorbs impact easily.

Alloy Fenders

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

Skid Pan

Aluminum Skid Pan
Manufactured on-site out of quality aluminum. Lasts much longer than the original plastic skid pan and is a much better form of protection! Includes all mounting hardware.

Tank/Seat Unit

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    $500.00
New gas cap and gasket   $24.95

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.
Sealant only   $59.95


Replacement Seat
 Replacement seat has plastic seat pan.  Finished in black. Fits 1976 model ONLY as is; will fit other twin-shock models when used with our universal fenders; bracket manufacture required.

Tank Decal

Tank Decals
"Block" Yamaha tank decals; fit the after-market seat/tank unit.

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

Protaper & Renthal Grips
Renthal grips in medium or firm compound: $15.95
Protaper grips $11.95
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

TY250 Footpeg Lowering Kit
B&J's TY250 Footpeg Lowering Kit
Footpeg lowering kit for the TY250! Does wonders for stance & balance. The lowering kits are bolt-on, but do require machining. Comes complete with all hardware and mounting instructions.
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!
From $32.95 to $34.95
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   $34.95

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  $28.95
White Tube  $29.95

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 do not include throttle assembly.
1974 TY250 throttle cable for Domino throttle to stock carb: $28.95
1975-1977 TY250 throttle cable for Domino throttle to stock carb: $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.

SprocketsAluminum Sprockets
Rear sprockets. We stock 53T but can get the size you want!

Front sprockets, 12-15T

Heavy-Duty Chains

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

Additional master link

520 Chain Conversion Kit

520 Chain Conversion Kit
Kit comes complete with a flat rear aluminum sprocket (machined to accept a spacer), rear sprocket spacer, front sprocket, and a heavy-duty chain. We recommend 44/10 gearing ratio, but we can provide the gearing you prefer. The chain comes with one exta master link.

Addtional master link:    $1.99
Replacement 520 chain:  $42.95

Chain Break Took

Chain Break Tool
Heat-treated, replacement tip included.

Extra tip   $2.95

TY175 Chain Tensioner

TY250 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

Points & Condensers

Points & Condenser
Points   $48.95

Condenser  $21.95

TY175 Electronic Ignition

TY250 Electronic Ignition
B&J's electronic ignition for the TY250 offers an advance curve that allows the engine to produce more torque and higher RPM, which in turn offers better traction and helps you achieve a lower score. All this, without points! What more could you ask? Includes on-site machined backing plate and all ignition parts, mounting hardware, NGK spark plug, a high-quality waterproof spark plug cap, installation instructions and a timing chart.

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.

Piston Kit

TY250 Piston Kit
Includes piston, clips, rings and wrist pin.
After-market Wiseco piston in bore sizes 70mm-72mm (.50mm increments). Let us measure your cylinder to ensure proper sizing!
Std/1st/2nd/3rd/4th OS: $156.00
5th/6th OS: $171.00

Top End Bearing

TY80 Rod Kit

TY250 Rod Kit
Comes complete with rod, big end pin, big end
bearing, small end bearing and thrust washers.

Gasket & Seal Sets

OEM Gasket & Seal Sets
Available individually or as a set.

Gasket set includes: Head, base, clutch cover, mag cover, oil pump cover, exhaust, and reed gaskets.
Set $99.950

Seal set includes: Crank o-ring, shift shaft, kickstart,
countershaft, and left & right crank seals.
Set $57.95

Oil pump cover & gasket

Oil Pump Cover & Gasket
When you have to remove your TY's oil pump, B&J's cover and gasket is a must-have!

Flywheel Puller

Flywheel Puller

Case Bolt Set

Allenhead Stainless Steel Case Bolt Set
When you're through refreshing the engine and ready to put it back together, dress it up with our stainless steel case bolts! Everything you need in one easy package.


TY250 Twin Shock WES Exhaust System

Replacement Exhaust System
WES exhaust system paired with a Sammy Miller exhaust pipe as installed on The Guru's tricked-out TY250. Alloy exhaust system saves 4lb over the stock system.
WES system (mid-muffler and silencer)  $350.00
Stainless Exhaust Heat Pipe  $179.95
WES system with stainless exhaust head pipe  $549.95
NEW From B&J!
Manufactured in house!
Modular design for easy cleaning and repacking.
This design also makes individual component replacement possible.
High-quality alloy rear silencer; re-packable.
Exhaust Pipe
Front Exhaust Pipe
Designed to replace original front pipe. Stainless steel construction.
Muffler Packing
Muffler Repacking Kit
Made of tough dura-flex hi-temp fiberglass designed specifically for exhaust use. 1"x5"x10-1/2".
Mikuni Carb Kit
Mikuni Carb Kit
 Refresh your tired stock carb with a new Mikuni carburetor kit! Pre-jetted, ready to bolt on, includes all you need to make your TY run like a dream: new carb, Domino throttle assembly (your choice fast or slow), and a new throttle cable.
Performance Upgrade Kit
 Upgrade your TY's performance level  with our performance kit. Includes the same carb/ cable/throttle as our regular kit but also comes with our oil pump cover and gasket, Renthal grips, PCW air filter, Boyesen reeds and our reed spacer kit.
Gas Cap w/Gasket

OEM Gas Cap with Gasket
Fits stock tank and the Sammy
Miller after-market tank/seat unit.

OEM Petcock Assembly

Petcock Assembly
Fits stock tank. $47.95
Petcock Washer
Now Available! Rubber Petcock 4-hole washer  $19.95
Fiber petcock washer $3.95

12mm petcock

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

Boyesen Reeds & Spacer Kit

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. Spacer kit sold separately.
B&J Spacer Kit
 Our reed spacer kit will give you more torque when paired with Boyesen reeds. Kit does not include reeds.

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.

Replacement cage:  $15.00

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

Pro Boost

Silkolene Pro-Boost Octane Improver
Increases the octane rating of your fuel while cleaning the carburetor internals, enhancing combustion efficiency, and combating pinging and pre-ignition. For all gas-powered engines.
We proudly offer both Silkolene and Maxima pre-mix, gear oil, fork oil and anything else you need! Call for pricing!

TY Fork Caps

Replacement Fork Caps

New! Finally, the long-awaited replacement fork caps for TY250 twin-shockers! Beautifully CNC-machined from billet aluminum. No longer do you need your Volkswagen oil-drain plug wrench to remove your fork caps. New caps are machined to be removed and replaced with a standard 23mm wrench. What an idea!

$65.00 pr 

Fork Seals & Wipers

Fork Seals & Wipers

Seal & Wiper set   $59.95
Seals only, pair   $19.95

Wiper, ea  $23.95

Fork Springs

Replacement Fork Springs
B&J's custom progressively-wound fork springs will replace the tired and sacked-out OEM springs.
$90.00 / pair
Don't forget the fork oil and our damper rod mod.

Replacement Fork Tubes

Replacement Fork Tubes
Manufactured to fit your bike!
$315.95 / pr

Custsom Falcon Shocks

Falcon Shocks
Custom Falcon gas trials shocks built on-site, re-buildable, re-chargeable. Truly customized to your rider weight, ability, and bike. Spring rates from 40 lb to 110 lb. Even a young rider benefits from the right shocks!
$370.00 / pr

Betor Shocks

Betor Shocks, 13.4"
Generic gas trials shocks with progressively-wound springs, 40 lb - 60 lb rate. Non-rebuildable, non-rechargeable.
$255.95 / pair

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

Tapered Steering Stem Bearing Kit
Performance up-grade $42.95 / set

Brake Shoes & Springs

EBC Brake Shoes
Front or rear
$23.00 ea

OEM Replacement Brake Springs
Front or Rear, ea   $6

Rim Locks

Rim Locks
1.6", 1.85", or 2.15"
$13.00 each

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.
Call for current pricing.


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  $145.95
Tubes, front or rear   $13.00
Tubeless Rear  $146.11

Michelin Trials Tires
Tube-Type Front   $102.95
Tube-Type Rear $163.95
Tubes, front or rear   $13
Tubeless Rear   $183.95

Dunlop Trials Tires
Front   $98.25
Rear  $141.79

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)
Cylinder Boring
Port Cylinder
Cylinder Head Mods
Reed Cage Mods
Crank Rebuild (plus parts)
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
From $90.00 each

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