Suzuki Hayabusa Gen 1
Compression and Leak Down Testing (Part2)
In Suzuki Hayabusa Gen 1 – Diagnose Mysterious Ignition Miss (Part 1), Brock demonstrated the ignition miss and explained what had been unsuccessfully tried previously to resolve it. He asked for the viewer’s thoughts/input and addressed those items in the comments section (please read).
Now that the bike is back on the lift, Brock dives into not only disassembling Scott’s beautiful Gen 1 Hayabusa but also addresses the proper way (in his humble opinion) to test for any other issues that could possibly be a problem, as well as issues that could quickly turn this series from a relatively simple repair into a full-blown engine rebuild. Watch as Brock explains how “he” attacks problems as unsolved mysteries have bitten him in the past….complete with stories, of course.
Brock not only performs a compression test but also fine-tunes his estimate of the engine’s overall condition by performing a leak-down test and documenting his results. Of course, Brock tries to explain his hypothesis and actions in terms that rookies and experienced wrenches alike can understand and appreciate.
**The information in this video applies to many other machines – we are simply using a Gen 1 Suzuki Hayabusa as it’s broken and readily available.**
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Suzuki Hayabusa Time Stamps
0:00 – Intro and airbox removal
2:53 – Ignition stick coil removal
4:32 – Disconnecting throttle body cables
6:34 – Prepping for valve cover removal
8:55 – Removing the valve cover
10:45 – Removing the throttle bodies
13:05 – What are we doing next?
14:16 – Compression check overview
15:55 – Compression ratio vs. test
18:25 – Removing the spark plugs
20:54 – Compression check on cylinder 1
23:00 – Compression checks on 2, 4, and 3
25:23 – Leak down testing overview
28:32 – Removing the crankshaft access cover
30:50 – Rotating the crankshaft into position
32:57 – Prepping for the leak-down test
35:00 – Locking crankshaft into position
36:11 – Performing the leak down test
39:55 – Discussing leak-down results
41:30 – Testing Brock’s hypothesis
43:30 – Conclusion / what’s next?
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