NH350 exhaust rocker box wanted

[JohnH]

Hi all. I'm brand new to the forum, and also new to old bikes. Been around them forever due to my dad having many, including a lovely 1955 NH350 that I'm enjoying getting on the road and using. Just discovered that the thread on the exhaust rocker box/valve lifter is stripped so trying to find a replacement.

Many thanks.

[dave.owen]

Draganfly had some made a few years ago. The only problem the inspection cap is a metric thread but I believe drags have suitable caps for the replacement rocker box.

Davr

[JohnH]

Oh really.. I'll contact them to check if they still have any. Many thanks

[dave.owen]

Looks like they have sold out

[JohnnyBeckett]

hi ,and welcome to to the forum , if no one comes up with one you can try EBAY under Ariel parts i have got a lot parts over the years off ebay last month i got a complete NH engine to send to someone

[JohnnyBeckett]

hi, their is someone on eBay selling a NH engine in parts you maybe able to buy the rockerboxs off Him the eBay number is 167516028563 and you use can find is phone number

[Simon.Gardiner]

Might be worth considering a thread repair (helicoil type).
Kits are fairly widely available online, you might even be able to source something locally.
The kits seem to be quite pricey (especially if only used for one job!) - cheaper than a new rockerbox though!

Another source might be Seb Mciver, if you can track him down. He seems to be fairly active on Facebook but that's not a place I'm very familiar with.

SG

[JohnnyBeckett]

hi my experience with old Ariel casings when you tap it to fit a recoil you may find the threads you tap to fit the insert break up or taps oversize the last one i done on the gearbox level plug i had to use jb weld with the insert to hold it in and i used a smaller tapping drill like they recommend , its maybe ok if its a deep thread but if you are going to do the
tappet adjusting cap i would not try there is not enough threads

[nevhunter]

Agree Johnnie. It's too fiddly and there's not enough metal to play with. Perhaps tap it (Fine thread) a bit oversize and make another Cap. nev

[Simon.Gardiner]

It's the exhaust lifter thread, not any of the caps.

SG