Petrol tank mystery
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Petrol tank mystery
Hello. Does anyone know what the purpose of the threaded inserts are beside the knee pad bars on some early 1960's lightweight petrol tanks? They are hidden once knee pad rubbers are in place.
- Ozmadman
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Re: Petrol tank mystery
I have asked this question before and had no answer. I have two tanks both identical but one has the holes and the other one hasn't so I wish someone could enlighten both of usnvmat1 wrote:Hello. Does anyone know what the purpose of the threaded inserts are beside the knee pad bars on some early 1960's lightweight petrol tanks? They are hidden once knee pad rubbers are in place.
Paul
Paul
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
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Re: Petrol tank mystery
I thought maybe they were to secure some form of chrome panels but that doesn't add up as both the tanks I have with the threaded inserts have old chrome plating. They do not appear on the later CSR tanks with stick-on knee pad rubbers.
- Ozmadman
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Re: Petrol tank mystery
Interestingly the tank that I have with the inserts was originally partly chromed, it's been rubbed down and painted over now. The one without the inserts was never chrome plated so why I wonder did the plated tanks have those holes? weird as they are in such a strange place??nvmat1 wrote:I thought maybe they were to secure some form of chrome panels but that doesn't add up as both the tanks I have with the threaded inserts have old chrome plating. They do not appear on the later CSR tanks with stick-on knee pad rubbers.
Paul
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Paul
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
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Re: Petrol tank mystery
My guess is that tanks originally intended to be chromed were painted.Ozmadman wrote:.... the tank with the inserts was originally partly chromed, ... The one without the inserts was never chrome plated
Or that maybe in order to reduce capital invested in stock a batch of dual purpose tanks were produced with inserts, so that they could be either chromed or painted according to varying production requirements.
Certainly cheaper to fit inserts to all tanks than to hold two types of tank in stock; some with inserts and some without.
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Which taken at the flood............'
Which taken at the flood............'
- Rob Harknett
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Re: Petrol tank mystery
The threaded insert may had been used to hold the tank during manufacture, when sprayed, stoved, dipped or electrostatic spray coated.
- Ozmadman
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Re: Petrol tank mystery
Thanks Rob and Neville, I did wonder whether this was the case, as it appears that only the chrome plated tanks had the insert so maybe they were needed for the plating practise.Rob Harknett wrote:The threaded insert may had been used to hold the tank during manufacture, when sprayed, stoved, dipped or electrostatic spray coated.
Paul
Paul
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
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Re: Petrol tank mystery
Off the topic of thread, but wondering where you got hold of the pin striping on your tanks or are they hand done? They look great.
- Ozmadman
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Re: Petrol tank mystery
It's hand done with pinstripe stencil tape ie: you put the tape on and then paint between the lines then remove the tape. Got it from hereboyd wrote:Off the topic of thread, but wondering where you got hold of the pin striping on your tanks or are they hand done? They look great.
http://www.finessepinstriping.com/striper_order.asp
Paul
Paul
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
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- Posts: 67
- Joined: Sat Nov 09, 2013 2:23 pm
- Location: GALWAY EIRE
Re: Petrol tank mystery
Nice job, you must have a steadier hand than me! I'll have a look into it