• Welcome to the website of the Vincent H.R.D. Owners Club.

    Should you have any questions relating to the Vincent H.R.D. Owners Club, or Vincent H.R.D. motorcycles in general, please contact Graham Smith, Hon. Editor and Webmaster by calling 07977 001 025 or please CLICK HERE.

    You are unrecognised, and therefore, only have VERY restricted access to the many features of this website.

    If you have previously registered to use this forum, you should log in now. CLICK HERE.

    If you have never registered to use this website before, please CLICK HERE.

Misc: Everything Else Norvin Rebuild



Rixon

Website User
VOC Member
#1
I've recently acquired a Norvin. It's in dismantled condition, with a few bits missing, and has been off the road for at least 25 years.
It belonged to a good friend of mine that sadly passed away some ten years ago. I remember pushing it down the road with him in the late 1970's !
My intention is to restore it and incorporate some improvements along the way.
I have a few choices to make. Front brake - I want something decent but it has to be a drum. I see there are lots of "replica" 4LS jobs available - Anyone have experience of a replica Robinson, or any of the others available ? Obviously price is a consideration and a £2000 plus job is not on the menu ! Anyone have anything suitable they may part with ?
Wheels, I wish to retain Borranis or Dunlops but18 or 19 inch ? Electric starter - availability and owners experience ? 12v electrics - as before ? Carburetors - currently on Amals but they look a bit "beat up".
All info and suggestions welcomed.
 

BigEd

Well Known and Active Website User
VOC Member
VOC Forum Moderator
#2
I've recently acquired a Norvin. It's in dismantled condition, with a few bits missing, and has been off the road for at least 25 years.
It belonged to a good friend of mine that sadly passed away some ten years ago. I remember pushing it down the road with him in the late 1970's !
My intention is to restore it and incorporate some improvements along the way.
I have a few choices to make. Front brake - I want something decent but it has to be a drum. I see there are lots of "replica" 4LS jobs available - Anyone have experience of a replica Robinson, or any of the others available ? Obviously price is a consideration and a £2000 plus job is not on the menu ! Anyone have anything suitable they may part with ?
Wheels, I wish to retain Borranis or Dunlops but18 or 19 inch ? Electric starter - availability and owners experience ? 12v electrics - as before ? Carburetors - currently on Amals but they look a bit "beat up".
All info and suggestions welcomed.
Lots of replica brakes available, maybe someone on here can give you some real-world feedback on that. Rims of a suitable shape/type are available, not sure if Dunlop rims are still available new. If it is a twin, does it have a chopped engine with a Norton or other gearbox or does it still have the Vincent box? If it still has the Vincent box the Grosset electric starter should fit, it works very well on my twin.
New Amal carbs are available, I've fitted new Mikunis to my twin. They work really well and I'm not too bothered about originality.
 

roy the mechanic

Well Known and Active Website User
VOC Member
#3
I have an original Robinson in a triton. Very good. John Mossey uses pattern ones in his customer builds. Inspected one made by classic racer suspension, appears to be well made, would have bought it if the money was in my pocket. As for carbs, wait until the motor is installed in the frame you will not have a lot of room! the starter is the same, on mine (look at the picture to the left) the right hand frame rail will not allow a Grosset unit to be used without some serious bodgery .Wheel rims I used are 19 front, 18 rear for bigger tyre choice. Keep on asking, you have the start of what could be a magnificent bike.
 

Rixon

Website User
VOC Member
#4
Bike is a twin and hasn't been chopped i.e still has the Vincent box. The Roadholder forks are missing, but I know these are not too difficult to source. I'm thinking to go with Cerianis though. Rear suspension - I have access to a set of original Girlings but I'm thinking Hagons may be superior ? Not being able to fit the Grosset electric starter has given me something to think about ! Thanks for the info so far.
 

evcomet

Well Known and Active Website User
VOC Member
#5
I bought this 4LS brake from caferacersuspension in May of 2017 after Greg Brillus posted a response to a similar question about my Egli build.

Search for this thread. Greg's response is #3.

Egli Comet brake question
Thread starter evcomet Start date12 May 2017 T


I bought the magnesium model. It is a very nice piece and the best price I could find.

Jerry
 

Attachments

druridge

Well Known and Active Website User
VOC Member
#6
There wouldn't have been room for a Grosset starter between the frame rails and my unchopped Norvin motor.
Standard Roadholders weren't up to the job either, Cerianis might be a good choice (or a set off a Guzzi/Ducati etc). In fact a whole front end off something Italian could be good?
I run 2 round barrel Guzzi's and both are happy on Koni's / Ikon's; I find these to be super well made shox.
I agree with 19" front & 18" rear, then you can use good tyres like Roadriders.
Mine ran on Monoblocks, but if there was room I would choose Delortos now.
 

vibrac

Well Known and Active Website User
VOC Member
#7
I hope the replica Robinson is better than the original on my Egli EV16 down the old long Norwich straight I found the lever on the twist grip and the bike in the gravel trap (still upright), terrible quality, poor castings, last I saw it was under Ron Kemps bench.. good riddance.
 

Rixon

Website User
VOC Member
#8
Well I've got the engine rebuilder sorted and also made some progress on the various parts I'm going to use.
I'm still looking for a better swinging arm than the standard one and also an alloy petrol tank supplier. Any recommendations ?
 

stu spalding

Well Known and Active Website User
VOC Member
#9
I've recently acquired a Norvin. It's in dismantled condition, with a few bits missing, and has been off the road for at least 25 years.
It belonged to a good friend of mine that sadly passed away some ten years ago. I remember pushing it down the road with him in the late 1970's !
My intention is to restore it and incorporate some improvements along the way.
I have a few choices to make. Front brake - I want something decent but it has to be a drum. I see there are lots of "replica" 4LS jobs available - Anyone have experience of a replica Robinson, or any of the others available ? Obviously price is a consideration and a £2000 plus job is not on the menu ! Anyone have anything suitable they may part with ?
Wheels, I wish to retain Borranis or Dunlops but18 or 19 inch ? Electric starter - availability and owners experience ? 12v electrics - as before ? Carburetors - currently on Amals but they look a bit "beat up".
All info and suggestions welcomed.
I fitted VM28 Mikunis to my Shadow 20 years ago and after about 6,000 miles a year they're still in fine fettle. The only problem is that the front float bowl hits the rear head. This can be avoided by elongating the stud holes a touch and rotating the manifold about the port axis. The manifold bend then swings the carb away from the head. They are to be highly recommended. Cheers,Stu.
 

chankly bore

Well Known and Active Website User
VOC Member
#10
The bloke I got Mikunis from in the U.K. was Steve from Motocarb. Haven't touched them since they were fitted. Just tell him engine, C.R. and exhaust system and he'll get very close to perfect first time. I would go 28mm.
 

ericg

Well Known and Active Website User
VOC Member
#11
What's wrong with Amals? They are cheap, available and if you use good air filters they don't wear as fast as people keep saying.
I don't have a car or a modern bike, I only use my old Brits for commuting everyday, week-ends and holidays trips and they all are fitted with Amals and are pleasure to ride.
Moreover they don't look totally out of place on an old British machine as some other instruments, but I know, it's up to each owner.
Fit a pair of new Amals and you won't be disappointed and keep your machine coherent. You'll also help to keep them available, remember, no demand, no offer.
Cheers.
Eric
 

vibrac

Well Known and Active Website User
VOC Member
#12
Well I've got the engine rebuilder sorted and also made some progress on the various parts I'm going to use.
I'm still looking for a better swinging arm than the standard one and also an alloy petrol tank supplier. Any recommendations ?
https://www.facebook.com/specialized.products12/
I know its unlike me to give a facebook link but I think the scammers have been at his main web site
he has done 2 Egli tanks for me and always has specials in work.
alan woodwood
 

Rixon

Website User
VOC Member
#13
Just ordered an electric start from Francois Grosset, the frame will need modifying to give some clearance but it's not a big issue. Carbs will be 30mm but I haven't decided on Amals or Mikunis yet. I suppose we'll have to make up the manifolds unless anyone knows where they can be sourced ? (Bike has two front heads).
 

Bill Thomas

Well Known and Active Website User
VOC Member
#14
I bought from Club Shop, Manifolds for Amal Mk2 that fits with the rubber mount for 2 front heads, They also stock for "C" type.
Very pleased, Only trouble, The hole is about 28 or 29 ish and I have 30 mm carbs, They are a bit too thin to take out anymore, But I have blended the ends, There is a step with this type of fitting anyway at the rubber.
I think they are out of stock for the front one, For a few months.
Cheers Bill.
 

timetraveller

Well Known and Active Website User
VOC Member
#15
If you are prepared to use copies of the Lightning and Grey Flash inlet manifolds then contact me. They are 32 mm internal and could be opened up but not shrunk down. They are longer than the standard adaptors.
 

dave61

Well Known and Active Website User
VOC Member
#16
Just ordered an electric start from Francois Grosset, the frame will need modifying to give some clearance but it's not a big issue. Carbs will be 30mm but I haven't decided on Amals or Mikunis yet. I suppose we'll have to make up the manifolds unless anyone knows where they can be sourced ? (Bike has two front heads).
I've ordered 30mm Mikunis from Steve at Motocarb, he was very helpful & seems to know his stuff.
Dave
 

dave61

Well Known and Active Website User
VOC Member
#17
I bought from Club Shop, Manifolds for Amal Mk2 that fits with the rubber mount for 2 front heads, They also stock for "C" type.
Very pleased, Only trouble, The hole is about 28 or 29 ish and I have 30 mm carbs, They are a bit too thin to take out anymore, But I have blended the ends, There is a step with this type of fitting anyway at the rubber.
I think they are out of stock for the front one, For a few months.
Cheers Bill.
Hi Bill,
I ordered my manifolds the other week & hadn't realised they were out of stock so still managed to put it in the "Shopping Basket",No hope for me !
Apparently it's going to be a couple of months before the next batch are in.
Cheers
Dave
 

vibrac

Well Known and Active Website User
VOC Member
#18
There is 'room' for a larger inlet pattern say 34mm for Mikuni that will allow for a standard tank cut out perhaps I shall just have to see if I have any triumph tiger cub exhaust pipe left and get brazing
 

timetraveller

Well Known and Active Website User
VOC Member
#19
Or you could buy aluminium Lightning pattern ones at £70 each and fit them at once. Even ready with the groove near the outer end to take the rubber adaptor.
 

Rixon

Website User
VOC Member
#20
I've got a chance to buy this original Yamaha brake. Is it a better bet than a modern replica Ceriani ? Also I'm not sure of the value but the owner wants more than a modern replica costs.

Brake + Speedo.JPG
 


Top