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by john.whiting
Sun Sep 15, 2019 11:49 am
Forum: Four stroke
Topic: Another Single Cam Thread
Replies: 3
Views: 263

Re: Another Single Cam Thread

Its more important to have the rod central when the mainshaft is pulled over by the sprocket spring.......I know the BSA factory used to have gauges to ensure Gold Star rods were exactly centralized in the crankcases.
by john.whiting
Sun Sep 15, 2019 11:44 am
Forum: A Bad thing happened to my Ariel
Topic: "That hasn't happened before . . ."
Replies: 15
Views: 546

Re: "That hasn't happened before . . ."

If you want to fit nuts in a spot like that,you can do a proper job by simply getting some thick washers and bevelling them to suit the angle of fit...............I had a similar thing with my 1200 Harley...all the rivets holding the sprocket ring onto the drum came loose....the 1200 sv doesnt have ...
by john.whiting
Fri Sep 13, 2019 11:37 am
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 3750

Re: 1948 Iron 4G Coil Ignition

I was talking to someone had a 6 cyl head reco d,and decided to fit all new ignition electrics.......bulk trouble ,like a carby problem,but he was able to borrow a working carby off another motor ,which made no difference...........after much mucking about,he discovered his new coil was too high vol...
by john.whiting
Wed Sep 11, 2019 1:02 pm
Forum: Ariel Talk
Topic: QD hub dismanteling
Replies: 11
Views: 428

Re: QD hub dismanteling

I would suggest using a backup that bears close as possible to the centre tube part of the flange......dont just press against the raised ring..........The Enfield wheels pressed apart easily,very little force was needed,and the ground surface of the tube was dimensionally identical between hubs.......
by john.whiting
Tue Sep 10, 2019 11:58 pm
Forum: Four stroke
Topic: Twin head gasket
Replies: 6
Views: 302

Re: Twin head gasket

The original A10 gasket was composite,and you wont get one the same ,because it was asbestos.
by john.whiting
Tue Sep 10, 2019 11:49 pm
Forum: Ariel Talk
Topic: QD hub dismanteling
Replies: 11
Views: 428

Re: QD hub dismanteling

I would say yes,pressed together.........Ive just done a similar job with Enfield wheels on a Panther.....a prewar Panther/ Enfield and a 1954 Connie rear were ground to exactly the same dimensions.........but be careful to get the hole alignment correct,or your spoke pattern will be wonky.
by john.whiting
Mon Sep 09, 2019 4:00 am
Forum: Ariel Talk
Topic: Oil not returning KH 500 Twin
Replies: 5
Views: 258

Re: Oil not returning KH 500 Twin

Pour about 1 pint of oil into the motor thru a rocker cover,which should prime the pump,then see if it ends up in the tank.......it will most likely be a matter of priming the pump............gear pumps sometimes take a while to prime if dry.
by john.whiting
Mon Sep 09, 2019 12:33 am
Forum: Ariel Talk
Topic: Oil not returning KH 500 Twin
Replies: 5
Views: 258

Re: Oil not returning KH 500 Twin

You cant see the oil returning in the round shape twin oiltank.........but if the level is rapidly going down with the engine running ,then its not returning.....conversely ,if the level is OK ,then oil is returning OK........it wouldnt have oil pressure for more than a very short time,as the pump d...
by john.whiting
Sun Sep 08, 2019 6:56 am
Forum: A Bad thing happened to my Ariel
Topic: "That hasn't happened before . . ."
Replies: 15
Views: 546

Re: "That hasn't happened before . . ."

As they are turned bolts,you could get Acme to make you some with oversize shanks ,and ream the holes in sprocket and wheel so the oversize bolts are a drive in fit......I would also "glue" together the sprocket and hub,and slop the bolts with loctite......My usual cure is to go to the nex...
by john.whiting
Sun Sep 08, 2019 6:43 am
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 3750

Re: 1948 Iron 4G Coil Ignition

The normal cam for two breaks per rev is a round with two flats opposite sides.........seems the maker just ground two lobes off a four, and as you say,its causing the coil to overheat.

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