The Spares Company
Club Shop/Regalia
Parent Website
Contact Officials
Machine Registrar
Club Secretary
Membership Secretaries
MPH Editor and Forum Administrator.
Section Newsletters
Technical Databases
Photos
Home
What's new
Latest activity
Forums
New posts
What's new
New posts
Latest activity
Information
Bike Modifications
Machine Data Services
Manufacturers Manuals
Spare Parts Listings
Technical Diagrams
Whitakerpedia (Vincent Wiki)
The Club
MPH Material Archive
Flogger's Corner
Obituaries
VOC Sections
Local Sections
Local Section Newsletters
Miscellaneous
Club Assets
Club History
Club Rules
Machine Data Services
Meeting Documents
Miscellaneous
Essential Reading
Magazine/Newspaper Articles/Letters
Adverts and Sales Brochures
The Mighty Garage Videos
Bikes For Sale (Spares Company)
Log in
Register
What's new
New posts
Menu
Log in
Register
Install the app
Install
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
A hole in on
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Ducdude" data-source="post: 17226" data-attributes="member: 2077"><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px"> I have seen this kind of damage before on pistons in engines were there was a good bit of detonation or knock caused by poor fuel with not enough octane in it, hi compression in the cylinders caused by carbon deposits build up, and incorrect timing...Any one or combination of any of the above can cause pre ignition in the cylinder and that can actually remove piston material from the piston crown and eventually blow a hole like you see here.. Often times there will be tell tail small dimples in the head of the piston where the material was removed. Sometimes if you look at the sparkplug under magnification you will see very small balls of silver material attached to it, this material used to be in the piston... If this is your issue the solution is simple, find out the cause of the pre ignition and adjust as needed..Or it could just be a carb out adjustment…or a bit of both</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">Cheers</span></span></p><p><span style="font-size: 12px"><span style="font-family: 'Times New Roman'">Eric</span></span></p></blockquote><p></p>
[QUOTE="Ducdude, post: 17226, member: 2077"] [FONT=Times New Roman][SIZE=3] I have seen this kind of damage before on pistons in engines were there was a good bit of detonation or knock caused by poor fuel with not enough octane in it, hi compression in the cylinders caused by carbon deposits build up, and incorrect timing...Any one or combination of any of the above can cause pre ignition in the cylinder and that can actually remove piston material from the piston crown and eventually blow a hole like you see here.. Often times there will be tell tail small dimples in the head of the piston where the material was removed. Sometimes if you look at the sparkplug under magnification you will see very small balls of silver material attached to it, this material used to be in the piston... If this is your issue the solution is simple, find out the cause of the pre ignition and adjust as needed..Or it could just be a carb out adjustment…or a bit of both[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]Cheers[/SIZE][/FONT] [SIZE=3][FONT=Times New Roman]Eric[/FONT][/SIZE] [/QUOTE]
Insert quotes…
Verification
What was Mr Vincent's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
A hole in on
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top