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Post by torinoman on Jan 15, 2024 8:28:52 GMT -5
Thanks everyone for all the advice on this topic. Black Trophy kit, a 15 piece jet kit, and new wrist pin bearing are ordered.
I see conflicting methods for assembly regarding sealants on the base and head gasket. Use it or not? Any experience with that? I need to pick up some Honda Bond if that step is needed. Seems to be about 50/50 on whether to use sealant or just the gaskets.
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Post by billwill on Jan 15, 2024 9:51:34 GMT -5
Thanks everyone for all the advice on this topic. Black Trophy kit, a 15 piece jet kit, and new wrist pin bearing are ordered. I see conflicting methods for assembly regarding sealants on the base and head gasket. Use it or not? Any experience with that? I need to pick up some Honda Bond if that step is needed. Seems to be about 50/50 on whether to use sealant or just the gaskets. Absolutely use honda bond. Was going to recommend just that. Just a thin layer is all you need. I would also use it on the intake surfaces. |
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Post by Lucass2T on Jan 15, 2024 10:00:34 GMT -5
I never used anything on the head of air cooled engines, apart from the head gasket itself. Just make sure the surfaces are clean. Some use copper grease. I never needed it and never tried it. If you feel you need to coat it in copper grease you should do it.
Regarding the base gasket, just like billwill said. Only use a very very light coat. When you tighten everything up all excess sealant will squeeze out from underneath the surfaces and end up somewhere inside the engine. Therefore only use a very thin coat.
Myself I like to use rtv on every gasket that sees a gas mixture. Engine case halves, reed gaskets and even the carb when it's bolted to a metal intake which uses a paper gasket (old suzuki geared bikes).
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Post by billwill on Jan 15, 2024 10:02:56 GMT -5
I never used anything on the head of air cooled engines, apart from the head gasket itself. Just make sure the surfaces are clean. Some use copper grease. I never needed it and never tried it. If you feel you need to coat it in copper grease you should do it. Regarding the base gasket, just like billwill said. Only use a very very light coat. When you tighten everything up all excess sealant will squeeze out from underneath the surfaces and end up somewhere inside the engine. Therefore only use a very thin coat. Myself I like to use rtv on every gasket that sees a gas mixture. Engine case halves, reed gaskets and even the carb when it's bolted to a metal intake which uses a paper gasket (old suzuki geared bikes). Good call I missed the talk about head gasket - I would not add sealant there. |
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Post by torinoman on Jan 15, 2024 10:27:13 GMT -5
Ok, I'll pick up a tube of Honda bond then. I assume I want the red tube HT stuff?
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Post by billwill on Jan 15, 2024 10:35:54 GMT -5
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Post by torinoman on Jan 15, 2024 11:06:46 GMT -5
That's the stuff I was thinking about.  |
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Post by torinoman on Jan 15, 2024 11:47:50 GMT -5
Just to clarify, I use the honda bond AND the paper base gasket?
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Post by billwill on Jan 15, 2024 12:03:22 GMT -5
Just to clarify, I use the honda bond AND the paper base gasket? Whatever gets you the right squish, if this kit even calls for measuring that. Essentially, its measuring the distance between the top of the head and top of the piston. I don't think you'll have to worry about measuring it with this kit but you can. A lot of folks hold a piece of solder in through the spark plug hole or tape a piece of solder across the top of the piston, then turn the engine over gently to get a squish measurement. With this kit I would run the base gasket and honda bond. 49ccscoot.proboards.com/thread/2355/video-squish-clearance-info |
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Post by torinoman on Jan 24, 2024 10:01:34 GMT -5
Ok, I'm about to pull the old cylinder and start the reassembly process. Quick question about the rings though. I'm thinking silver ring is the top one? Of course there wasn't any instructions with the Black Trophy kit. On a side note, I'm pretty sure it would have been easier to pull the engine off the bike instead of tearing everything off the frame to get enough room.  |
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Post by Lucass2T on Jan 24, 2024 10:27:21 GMT -5
The black one at the bottom and the silver one on top
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Post by Zino on Jan 24, 2024 19:24:11 GMT -5
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Post by torinoman on Jan 24, 2024 21:26:16 GMT -5
Thanks guys! Not sure how I missed that video with all the research I've done!
I have high hopes for the kit but also realize I won't be using it to it's full potential with the stock carb and oil injection.
One thing I've learned about this scooter stuff is that there's always a next step! 😂
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Post by bigmatthew86 on Jan 24, 2024 21:42:07 GMT -5
I ran that kit 2 different times on a bug eye. Once with the stock carb & once with dell 17.5, both still using the oil injection. Honestly couldn’t tell much difference between the 2. 2nd kit is still alive on my vino with stock carb & oil injection.
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Post by Zino on Jan 24, 2024 22:29:23 GMT -5
oil injection works fine
I ran my some racier zuma builds all the way to 11k rpm with stock oil injection .
check out some jmkjr72 posts about his top trophy on a bug eye zuma he was running a street pipes stock carbs stock gears doing 55 mph
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