Brocks Performance Piston To Valve Clearance Inspection Tool Busa (99-13) - Manual

BPP-VTOOL2
Brock’s
Performance
Products -
Valve Tool 2
This Package contains:
1 Valve Tool
For more information go to www.BrocksPerformance.com, click: Installation Instructions
email: [email protected] or call the Tech Line 937-912-0061
Brock’s Performance Products policies and warranty information: www.BrocksPerformance.com, click: Policies
Introduction
Brock’s Valve Tool Instructions
1. Locate Top Dead Center (TDC) using a degree wheel and the
positive stop method.
2. Postion a plunger style dial indicator to measure the full travel
of the most accessible Intake or Exhaust Valve Bucket.
Note: Most late model engines leave VERY LITTLE room for this
operation. A small length of welding rod can easily be mounted
to the indicator tip, as shown.
3. The closet point of contact is usually found AROUND 7-10
degrees Before Top Dead Center (BDTC) on the Exhaust Side
of the engine and 7-10 degrees After Top Dead Center (ATDC)
on the Intake Side when using Brock’s Performance Products
Top End kit Components
Special Note: we use the term “AROUND” 7-10 degrees
because any combination of components can cause this exact
number to vary. Some engine builders will check every degree
from 2-15 degrees to determine the worse case clearance for a
particular engine. Experiment with your engine, it will take a bit
more time but it is far better to be safe than sorry.
4. Once the proper combination of clearance and lobe center
numbers are obtained, use permanent thread lock to secure
the bolts on the slotted cam sprockets.
The Brock’s Performance Products Valve Tool (BPP-VTOOL2) is designed to quickly and easily determine piston to
valve clearance in late model shim-over-bucket style Sportbike engines.
BPP-VTOOL2 is used to measure the piston to valve distance (Intake and Exhaust) by levering the valve down to gently touch the
piston at its closest point relevant to crankshaft rotation. A plunger style dial indicator is used to measure the travel of the bucket
until the valve touches the piston. This allows the engine builder to measure the exact amount of clearance without the use of clay
or repeated disassembly. Piston to valve clearance is CRITCAL to engine life. The best horsepower producing lobe center numbers
make little or no difference if your engine is destroyed due to piston to valve collision while using them. Minimum pistons to valve
clearance specifications are different for each engine/configuration. The combination of variables is huge with most clearance
requirements being determined as a result of experience. Adjustable cam sprockets are required to set clearances. By using this
tool you will also realize that minimum clearance WILL NEVER be found at top dead center (always before or after), this mindset has
destroyed many engines. Brock’s Performance Products supplies specifications for our components, contact us for details.
BPP-VTOOL2 is designed specifically for the Suzuki Hayabusa, but has also been found to be useful in many other applications from
600cc engines to Pro Stock. Valve tool may be ground to fit other model sport bikes.