500 1974 H1-E Engine Rebuild
DISCLAIMER: The following is not intended as a how to guide. If you have questions concerning something you have seen, contact us, and always seek the advice of a professional if you are unsure of anything. Mistakes can cause injury or death.
Tear Down Photos
The most common problem areas you find during the Tear Down of the H1 engine are stuck cylinders, and frozen bolts. Unfortunately both take time and patience. Penetrating oil, heat and wedges eventually free the cylinders up. Since my shop is located next to some cabinet shops I have an endless supply of maple wedges. There are hard plastic wedges on the market and I also use them
Beginning during the Tear Down Phase engine components are checked for visual sighs of wear and damage. Some items such as transmission clearances are checked before they are removed. Parts are then cleaned, measured, and compared to factory specifications.
Problems of note on this engine were the burnt shifting forks, some shift drum wear, chipped gear tooth, clutch basked gear loose on the rivets, and blow by past the piston rings.
This engine was thoroughly washed and had the cases, cylinders, and heads glass beaded. The cylinder studs were removed and cleaned up on the lath. The cylinders and pistons were well within factory specs so only the rings were replaced. A new shift drum along with three shift forks were installed, and the clutch basked and primary gear replaced.
Test and Tune Photos
After an engine has been rebuilt it is installed in one of the test bikes. The bike is set up the same as the setup of the owner. In this case the owner was using a stock exhaust and replaced the air box with oil type filters. The bike is ridden about two hundred miles (200) and adjustments are made as required. Before removal the engine is checked for oil leaks and seepage past the head gaskets and exhaust copper rings.