mickymidas
High Number
2Ronnies sc , Nuneaton.....Promoting chuckleism to the masses
Posts: 232
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Post by mickymidas on Jul 22, 2015 7:39:17 GMT
3rd time this has happened!!!!!... :x :x :x :oops: :oops: This last time was 11 miles in to a 65 mile run to a rally & bumbling along about 40mph
.Flywheel side bearing race has tried to work its way off the crank, resulting in the bearing collapsing and the needle rollers jamming the crank...After the last time i had the crank checked for twisting and was ok..used genuine Vespa bearings and loctite on the race and had the crank and bearings refitted by a trusted local scooter tech.
Local scooter bods not heard of this happening before ...Any ideas why ? or solutions to the problem would be gratefully accepted . HB fettled P200crank running with a HB stage 4 barrel , head & piston.
Cheers m'dears
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Post by henri on Jul 22, 2015 14:22:08 GMT
i'm taking it to mean the inner race is moving outwards pushing the seal , weird one , as its 3rd time think we can rule out a bad bearing , an its a harry barlow crank , he's a good rep , so unless he gave the tea boy a go n he fecked it up ,should be able to rule crank out ,
the thrust of clutch moves crank over that way but that would push race onto it not off if it was moving it , only thing i can think is to get crank checked for size n ovality ,as the inner race is a tight interference fit an if loctited aswell should be on for good ,
might be time for the hb crank to become 1 more interesting paperweight/garden cat deterrent,
just had 1 thought ,"genuine piaggio bearings" ,there SKF in a piaggio box , got nothin against SKF ,use em myself on stock motors , but i think if crank pin checks out ,would re-build with sip/koyo heavy duty bearings on a stage 4 , or ask HB tuning what they reckon/recommend . H
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Post by vespasco on Jul 22, 2015 17:45:06 GMT
Id say the crank is the culprit too.
Especially if you need to loctite the inner race!
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mickymidas
High Number
2Ronnies sc , Nuneaton.....Promoting chuckleism to the masses
Posts: 232
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Post by mickymidas on Jul 23, 2015 5:56:49 GMT
Thank you both , think I may do a full rebuild & return to standard everything but use upgraded bearings . Mick  |
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Post by henri on Jul 23, 2015 14:37:42 GMT
or take opportunity to get a long stroke crank n space ya HB barrel up to match ,if wanting to go back to strict stock , can i have first dibs on the HB barrel/head/piston please . i know i'm a vulture ,but i did ask nicely ,H
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Post by henri on Jul 23, 2015 16:28:01 GMT
still circuling up here ,to sweeten the pot i have a stock p200 barrel/head/piston n rings , an crank ,was goin to use crank but if my hands fell on a harry barlow barrel ,well that crys out for a long stroker crank ,so my stock 1's surplus to requirements , just a idle thought as i sip a sherry waiting for my tea , straight swap ,your barrel/head/piston versus my crank/barrel/piston n rings/n head , each pays there own postage ,H
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mickymidas
High Number
2Ronnies sc , Nuneaton.....Promoting chuckleism to the masses
Posts: 232
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Post by mickymidas on Jul 23, 2015 19:00:55 GMT
I've still got my old standard barrel, head & piston , h , but when I decide what to do I will let know mate .
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Post by henri on Jul 24, 2015 7:34:51 GMT
damm, another dream bites the big one , H
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Post by henri on Aug 18, 2015 16:10:45 GMT
if ya aint got a crank yet , facebook "scooterist items for sale" page , guys selling a stock p200e crank from a runnin lump £35 of your "earth pounds" , just a thought , H
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Post by pxguru on Aug 19, 2015 8:53:19 GMT
I take it the engine casings are a matching pair? And the oil hole between the crankcase and the outside of the flywheel main bearing is not blocked or covered?
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