05 CRX450

Noticed the retainers on intakes are diff from intakes? One set has a perfectly flat top (intakes), while exhausts have a beveled edge. Is this correct and why?

components will have been designed to be as light as possible while still having the required strength. The bevel is to reduce weight and eliminate areas of stress build up and will be the result of FEA stress analysis by the honda engine design team.

Not all relevant to your question but:

inlet retainers fit inside a bucket, exhausts do not (not related to the bevel).

stem diameters are different - 5.5 inlet, 5 exhaust.

make sure cotters and retainers don't get mixed up as they are different.

when disassembling, put each set of valve train components (valve, spring, spring seat, retainer, cotters etc) in a seperate bag with a piece of paper "left exhaust", "right inlet" etc.

Edited by mtrehy, 07 April 2012 - 08:55 AM.

If you use the intake retainers from the TRX, you'll notice they are also lightened like the exhaust retainers. They look the same except for a groove cut around the top. This will help to offset the added mass of the steel TRX intake valves.

Ok so I just wanted to be SURE that they were in fact supposed to be slightly different?