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Misc: Everything Else Grey Flash Replica


Michel

Well Known and Active Website User
VOC Member
Hi everybody,
As you know, from 1949 to 1950 in seven months, Vincent HRD manufactured and sold 31 Grey Flash. 3 equipped for the road and the other 28 for the track. Of the 3 "roads", 2 were reconfigured for the track. There was one left that Patrick Godet found in Belgium. The motorcycle has been restored (or is in the process of being restored) and sold to a French citizen living in Florida. At the beginning of the 1980s, Patrick made 7 replicas of Grey Flash and he had returned a spare one. He had to restore it for a Swiss member of the club who gave up the idea. In early 2018, I found an agreement with Patrick to complete the project and rebuild the bike copied to the original still in the workshop. My Grey Flash is almost finished and will be delivered late February early March for the season.

25928

I am impatient.
 

vibrac

Well Known and Active Website User
VOC Member
I keep thinking about putting my Flash replica on the road more, it is registered it has a road kit quickly fitted of a rear number plate/reflector and bulb horn ( it has a bicycle speedo and a restricted 105Db race silencer already fitted) and I do take it out on circular runs with a roller starter at home and a good wife and van on the mobile. Otherwise I use it in parades and runs like KOP hill
I have a number of fifties Albion boxes with kick starts I suppose its just a case of fitting all the kickstart gubbins and a road front cover and hoping it misses the correct reset gearchange I would not worry about lights
Hmmm another job on the list I already have an Egli Comet to run in. here it is in road trim a year or so ago

25929
 

timetraveller

Well Known and Active Website User
VOC Member
I think that latterly Patrick was using one of the JE steering heads. They are available in aluminium and soon to be available is an aluminium copy of the whole steering head that bolts into the oil tank. Available with taper roller head races fitted if you wish.
 

timetraveller

Well Known and Active Website User
VOC Member
Not yet. The castings are finished and heat treated (LM25) and are waiting to be machined. The alloy JE steering heads are well tested as there are about ten out there. We used my original steering head castings, one for the older split bottom end and one for the later solid bottom end. These were suitably thickened up and coated to allow for casting shrinkage and the fact that ali was to be used rather than steel or cast iron. They will look very similar to the originals when finished. The ali JE steering head save about 2 lbs/1 kg in weight when compared to a steel one so the new heads will save a lot more. I will post something when we have one, or a pair, finished.
 

davidd

Well Known and Active Website User
VOC Member
I think that latterly Patrick was using one of the JE steering heads.
Norman,

Because I was involved with the steering stems that Patrick used I started a new post on his stems.


David
 

Michel

Well Known and Active Website User
VOC Member
A visit to Patrick's workshop. The seven first pictures are those of the last Grey Flash configutation route from 1950. On the eighth picture, the two motorcycle side by side: on the left the Godet's replica from 1980, on the right the original which used as model. The Godet's replica is now in my garage (others pictures later).
 

Attachments

vibrac

Well Known and Active Website User
VOC Member
A few detailed pictures with kickstart fitted and closeup without would help me if I want to ride my Flash to a VOC Rally rather than just ride it on the track or circular road runs starting and finishing by my rollers:D. My box is a pure racing box without a kick start cover but I have plenty of contemporary road covers and some varied kick start cranks (ugly beasts that they are)
 

MartynG

Well Known and Active Website User
VOC Member
Was that the original decompresser or arrangement - via a second spark plug hole in the head??
 

greg brillus

Well Known and Active Website User
VOC Member
Royal Enfield decompressor in the left plug hole, as it's running an original BT-H magneto, single spark ignition.
 

vibrac

Well Known and Active Website User
VOC Member
I have always used re decompressors I only wish they were threaded full length being half the length of the spark plug hole there is some carbon build up
however the alternative of loose rollers and knitting needles in the timing case and loss of a 100% oil free backside makes that a minor inconvenience
if it was that bad I suppose it's a just few hours on the lathe to put it right.
 

vibrac

Well Known and Active Website User
VOC Member
They are very handy on twins when you can 'tune' them individually to open one valve before the other so you can kick on the correct pot.
 

Michel

Well Known and Active Website User
VOC Member
I have to make a correction because my memory is faulty. During the delivery of the bike, François Guerin (Patrick's workshop manager) reminded me that it was not the Swiss Grey Flash that I bought because this guy could not decide. Patrick had kept another boxed for his own collection and decided to sell it to me. In the end, it's this one was rebuilt and put back on the road.
 

Michel

Well Known and Active Website User
VOC Member
As you know yet, the late Patrick Godet sold me a splendid Grey Flash replica road version identical to one of the three built in 1950 by Vincent. The bike is equipped with the original carburetor AMAL 10TT9 but it is not suitable for easy use on road or rally. According to opinion from AMAL, I could install a 229F /1DV (that of the Comet) and it seems to me a good idea. The performances of the Grey Flash is different and much better than that of the Comet, it would be possible to change elements of the carburetor such as main jet, needles, jet block, throttle valve or others, I don't know what's the best. What do tou think about this kind of carburetor's modifications ?
I thank you for your advices.
 

vin998

Well Known and Active Website User
VOC Member
VOC Forum Moderator
I ran a Velocette Venom years ago on the road with a 10TT9 carb and as far as I can remember the carb was never a problem, even managed to get a tickover. It ran great on that TT carb and its still on, but I have not run the bike for a few years now.
Anybody interested in buying a 1959 Venom in Mk1 clubman trim?

Simon
 
Last edited:

timetraveller

Well Known and Active Website User
VOC Member
It depends upon the inner diameter of the 10TT9. It is probably 32 mm. The type 229 will be 1.125" (28.5mm). That is really going to choke the poor bike up. If you do not mind it looking too 'modern' then a 32 mm Mikuni could be the answer.
 

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