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by Simon.Gardiner
Mon Sep 19, 2011 11:41 pm
Forum: Ariel Talk
Topic: Help needed on 51 VH500
Replies: 33
Views: 3893

Up to '52 lower tab goes on a stud in the engine plate (as described in previous posts) '52 on (rigid/plunger) the tank tab goes on the top gearbox mounting stud, but the engine plate still has a hole in the exact same place for the earlier oil tank stud. (Later plate can be converted by brazing a p...
by Simon.Gardiner
Sat Sep 17, 2011 3:40 pm
Forum: Ariel Talk
Topic: Grease nipples on headstock
Replies: 3
Views: 899

I think there is supposed to be a felt washer (more like ring) around the stem just below the point where the grease enters from the upper nipple (maybe one above the lower grease point as well). You'd get two smaller voids to fill up intead of one big one...
by Simon.Gardiner
Tue Sep 13, 2011 11:07 pm
Forum: Electrics
Topic: Contact breaker problems
Replies: 12
Views: 3987

This is mainly aimed alternatives for twins but there's some mention of 'singles' (albeit BSA, the installation should be similar) in this info from Goffy's web site. (And I've just noticed the kit aimed specifically at Leaders and Arrows !). However, it seems to me that a full replacement ignition ...
by Simon.Gardiner
Mon Sep 05, 2011 12:36 am
Forum: Four stroke
Topic: Balance factor
Replies: 5
Views: 1496

My '53 NH would happily thrash down motorways at 70-75 all day long, although the big-ends would disappear after 7k miles. It was much smoother after I started putting the crank back together with the absolute minimum run-out. (Up to a point, as has been said, things will always fall off, but it sho...
by Simon.Gardiner
Fri Aug 26, 2011 9:15 pm
Forum: Four stroke
Topic: Noise
Replies: 10
Views: 1766

I'm not sure this has eliminated the possibility of transmission which can also be affected by load (retarding ignition = less load?) 'whine' sounds more like bearing/gears or possibly chain/sprocket, 'clanky' could be chain, clutch, broken bearing? Or something loose. Or possibly even the camshaft ...
by Simon.Gardiner
Fri Aug 26, 2011 12:02 am
Forum: Four stroke
Topic: Difference between late KH and FH chaincases
Replies: 4
Views: 777

PS - casting number on that chaincase inner is also K400
by Simon.Gardiner
Thu Aug 25, 2011 11:50 pm
Forum: Four stroke
Topic: Difference between late KH and FH chaincases
Replies: 4
Views: 777

Where's my anorak gone..... '56 part nos for chaincase inner, 5711-56(singles), 5712-56(FH), 5713-56(KH) However I have run a bike where the 650 engine was swapped for a 500 single, the chaincase wasn't changed, I cut a spacer from a piece of alloy sheet and used it between the chaincase inner and t...
by Simon.Gardiner
Thu Aug 25, 2011 11:14 pm
Forum: Main Chat Forum
Topic: 1949 ariel 350 twinport
Replies: 11
Views: 2940

That looks like a 6-pint 500 oil tank as well but both very practical even on a 350...
by Simon.Gardiner
Mon Aug 22, 2011 12:21 am
Forum: Four stroke
Topic: NH Barrel Spiggot height
Replies: 4
Views: 863

I've just pulled out a rather grubby 52-55 type, I wouldn't like to guarantee the spigot height(partly because it's still got the copper gasket well stuck on) but the diameter is about 3.156 - maybe 3 5/32 ? However, I've got a feeling that the later ones also have an extra fin - this one's got 10 f...
by Simon.Gardiner
Sat Aug 20, 2011 11:45 pm
Forum: Four stroke
Topic: NH Barrel Spiggot height
Replies: 4
Views: 863

From 1952, bigger finning on head and barrel, head gasket and smaller spigot on top of barrel (smaller diameter and slightly lower as well). The 350 kept an iron head until 1956, and in 1955 (I think for the one year only)there was much more pronounced finning in the area above the push rod tubes. (...

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