APE manual cam chain tensioners are designed to replace the automatic and hydraulic tensioners on high performance engines.  The automatic adjusters can back out when the throttle is suddenly closed at high rpm. This allows the camshafts to go momentarily out of synchronization and can result in bent valves or serious engine damage.  Hydraulic tensioners have a tendency to put too much tension on the chain guide under high rpm or high oil pressure conditions resulting in premature wear.

Both problems can be eliminated with the installation of the APE manual tensioner.  No mater what the engine does, the cam chain tension will remain constant.  An APE manual cam chain tensioner is a must for any kind of performance riding.  The new APE Pro Series tensioners are designed for racers who need to frequently adjust their cam chains.  The easy-access socket head adjuster screw is perfect for tight spaces.  The interior o-ring design ensures that repeated adjustments will not eventually flatten the o-ring against a jam nut.  The HT900-PRO tensioner is anodized red with stainless steel hardware and a fully machined adjuster bolt.  It comes with two 6mm mounting bolts and gasket.

APE manual tensioners are CNC machined from billet alloy to exact tolerances for perfect fit.  This cam chain tensioner will fit ALL of the following models:

• Honda CBR600 F4 (ALL)
• Honda CBR600 F4i (ALL)