2-compendium2-0

2-compendium2-0 - Compendium of e Group Articles Collated...

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Unformatted text preview: Compendium of e Group Articles Collated by; Les Carman 1039 24 th January 2003 Velocette Technical Articles, Version 2.0 24 th January 2004 Velocette Technical Articles 1 Index This document contains a selected list of Velocette technical information submitted by the members of the Velocette technical e Group. It is further supplemented by technical articles from the Velocette Owners Club website. To go strait to the section place your cursor over the section heading below, hold the control key down and left click your mouse. Engine Gearbox & Clutch Fuel, Oil & Oiling System (for oil pump see Engine) Frame (inc. wheels & tyres) Electrics Cables & controls Chains/Belts & Chaincase Racing & High Performance Miscellaneous Suppliers Velocette Technical Articles, Version 2.0 24 th January 2003 Velocette Technical Articles 2 Engine (for high performance tips see under Racing) #6 Recently we have had two different makes giving problems with seizure of inlet valves. The Velo, a late Venom, fairly new to us, is almost certainly because the the machined boss on which the M38/4 valve spring bottom holder sits was badly cast, and is offcentre. Late heads are called "diecast" but in fact, the ends are formed possibly by a die, but the central part is a core as in sandcasting. The boss is offcentre laterally, and does not support the M38/4 properly on one side. We welded and remachined, and hopefully this will cure the problem. The spring tended to tilt the valve laterally when pressure was applied. Hairpin valve springs are probably prone to the problem of different pressures between the two individual springs. One answer might, at the top of the valve stem, to make two demi-spherical parts to allow the springs to tilt a little without transmitting lateral thrust to the valve. Or fit coil springs, but make sure the seating for the spring, and the top collar, as well as the spring, have perfectly parallel faces.. #70 I have recently acquired a 1960 Viper - has anyone any comments on how the valve lifter should be set on this bike? #80 according to Ivan Rhodes' book your engine no. 16798 is from 1951 production. Rupert Banwell said in Ft 264 from June 94, "Useful information for rigid MOV & MAC", that in 1951 from MAC 15982 the alloy engine was introduced with either iron or alloy cylinder. I have engine no. 18233 from 1952 with alloy cylinder head but iron barrel.(Walter Probst) #81 My 1960 Velocette Venom is fitted with both the 0.010" and the 0.031" compression plates on the cylinder base. Prior to my recent engine overhaul the tappet adjustment has always been at the end of the useful travel with the adjusters screwed right through the rockers so that there is only just enough tappet left for the nut to be tightened on....
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This note was uploaded on 03/31/2012 for the course TAX 4001 taught by Professor Robertmcgee during the Spring '09 term at FIU.

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2-compendium2-0 - Compendium of e Group Articles Collated...

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