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Latest discussions at Pit Bike Club: - Caesars Benefit Code FANNATIONFULL Gets $1, 250 fo...
2 clubs off to frustrating beginnings to the 2023 Big league Baseball season, the Chicago Cubs and San Diego Padres, ... - 88cc build
In the process of building an 88cc from a 50cc engine,( im bored !) Can they run on a flat top piston ? and can you use... - epicmoto help
does anyone know where i can get replacement parts for an electric pitbike ?
please email me...
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14-02-2012, 12:29 PM
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#1
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Novice
Join Date: Nov 2010
Age: 41
Posts: 20
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Top end assembly
Hi. i am putting the top end back together and have a few questions. How many of the locating collors go between the barrel/cranks and head/barrel. How many oil seals should there be? Is there some that go round the studs?
Thanks.
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14-02-2012, 12:48 PM
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#2
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Burning Rubber
Join Date: Jan 2012
Location: debenham, stowmarket
Age: 36
Posts: 238
Bike: yamaha yzf-r6
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Re: Top end assembly
I believe 2 colors between engine and barrel and 2 between barrel and head. 1 oil seal between barrel. and head but doesnt go round any of the studs
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14-02-2012, 01:26 PM
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#3
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Novice
Join Date: Nov 2010
Age: 41
Posts: 20
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Re: Top end assembly
Nice one. thanks. am i right in thinking when the piston is TDC It should be flush with the end of the barrel. cheers.
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14-02-2012, 01:31 PM
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#4
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PBC Legend
Join Date: May 2006
Posts: 6,481
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Re: Top end assembly
Quote:
Originally Posted by Z50Tim
Nice one. thanks. am i right in thinking when the piston is TDC It should be flush with the end of the barrel. cheers.
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pretty much yes (depending what piston it is)
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14-02-2012, 02:34 PM
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#5
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Novice
Join Date: Nov 2010
Age: 41
Posts: 20
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Re: Top end assembly
Its flat top i think. its a standard xsport 110 one. ill have a look next time Im in garage.
Thanks.
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14-02-2012, 03:42 PM
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#6
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Burning Rubber
Join Date: Jan 2012
Location: debenham, stowmarket
Age: 36
Posts: 238
Bike: yamaha yzf-r6
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Re: Top end assembly
Just make sure when u put it together that u turn the engine over slowly by hand via the flywheel to make sure the valves don't scrape or hit the piston. If its all good fire it up 
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14-02-2012, 06:22 PM
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#7
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Novice
Join Date: Nov 2010
Age: 41
Posts: 20
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Re: Top end assembly
Thanks. i will do. i should get it all back together tomorrow night. Think the wife would go nuts if i went in garage tonight. i did manage to look at the piston tho and it sits flush with the end if the bore. It was the new gasket making it look like it didn't.
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14-02-2012, 07:28 PM
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#8
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Burning Rubber
Join Date: Jan 2012
Location: debenham, stowmarket
Age: 36
Posts: 238
Bike: yamaha yzf-r6
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Re: Top end assembly
Cool man yeah I would get in trouble if I started messing around with my bike tonight aswell
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19-02-2012, 10:12 AM
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#9
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Novice
Join Date: Nov 2010
Age: 41
Posts: 20
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Re: Top end assembly
I have got the engine back together and back in the bike. it started after a few kicks but there is a horrible knocking noise from the top end. When you turn the engine over by hand there is no clearance issues its just when its running. Ive reset the tappets and its no better. any ideas what it could be before i strip it back down. ta.
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19-02-2012, 10:19 AM
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#10
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Novice
Join Date: Nov 2010
Age: 41
Posts: 20
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Re: Top end assembly
I forgot to mention. When i set the timing it was about 1/2 a tooth out. it was the nearest i could get it.
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Linear Mode
