Get this adjustable sprocket and advance your cam timing. Good for modified engines Suits ATC185/S 80-83, ATC200/E/ES 81-84, ATC200X 83-85, ATC200M/S 84-86

Here is a replacement Crank Sprocket for 185 & 200 Engines. Worn sprockets can shorten the life of chains so it makes sense to replace this item at the same time. Why risk expensive damage to your engine if the chain fails due to worn out sprockets. Suits ATC185/S 80-83, ATC200/E/ES 81-84, ATC200X 83-85, ATC200M/S 84-86

Here is a replacement camshaft for your ATC, it is a mild grind mid-range cam, good for stock or modified engines, gives smooth idle and increased power in low to mid range. To gain best results we recommend carb rejetting and a low restriction exhaust system. Suits ATC185/S, ATC200/E/ES, ATC200X 83-85, ATC200S/M

ATC70 models can be especially hard on rocker arms, as well as the entire drive train. It is common for the oil pump drive gear teeth to wear down on these models, when this happens the top end is starved of lubricant causing accelerated wear. These premium Japanese made rocker arms will replace you old worn out arms perfectly.

Temp out of stock

Boyesen Reeds, suits Yamaha Tri Zinger YTZ60 84-85

Temp out of stock

Boyesen Reeds, suits Yamaha Tri Moto YTM125 80-82

Temp out of stock

Boyesen Reeds, suits Yamaha Tri Moto YTM125 83-86

Temp out of stock

Boyesen Reeds, suits Yamaha Tri Z YTZ250 85-86

Give a thought to replacing your rocker arms in high hour engines. These engines work hard and run hot and it is not uncommon for the case hardening to wear off the rocker arms. When this happens the valves will not open fully leading to loss in power, if your old rocker arms are worn you could be missing out on serious horsepower, and every bit counts. Replace your old worn rocker arms with these quality japanese made units. Suits ATC185, ATC185S, ATC200E, ATC200ES, ATC200M and ATC200S 80-86, ATC200X 83-85.

The cam chain tension is a vital component in your engine, when the tensioner becomes worn it cannot correctly tension the chain and results in excessive chain noise and wear. Always replace this item at the first sign of wear or when doing a top end rebuild. Suits ATC185/S 80-83, ATC200 81-83. ATC200E/ES 82-84, ATC200X 83-85, ATC200S/M 84-86.