RD400 - leak down tester

[vinyas]

Any off the shelf leak down tester available for Yamaha RD400 ?

[rodneya]

HVC  and Economy sell them. Cheaper one looks out of stock and the other option is pretty pricey.

[RDFL]

Search ebay for Banshee leak down.

[pidjones]

Hardware store stoppers for the carb boots, thick rubber blank gaskets held in with the downpipes on the exhaust, couple fuel tees from auto parts store, fuel pump/vacuum gauge from Harbor Freight. Carefully press it up to 6 psi with your compressor regulator backed all the way off of a tire hand pump.

[Diablo007]

https://www.toolsource.com/upper-engine-tools-c-468_849/motorcycle-timing-gage-for-14mm-plug-size-p-124984.html?tsqtid=928030

Best price I was able to find shipped to HI.  Mainland buyers have more options though.