Riptide Boatman Single

[Collector Inspector]

I have taken some pics of port layout using a twin as an example...........same deal for an original single.

These are not of the single as I will not have it apart until the weekend so just what they are like.

I see an issue with the exhaust timing being advanced by the dodgy piston by comparing visually at BDC, I have included the previous single pic along with what I could take just now re exhaust opening......

Pics are hard to get into any logical order so lame attempt at adding description

Early daze yet, more on Saturday.

I am thinking that the dodgy piston and overbore will not be any good the more I look at things...............

Cheers

B

[Hugz]

Re having photos where you wish to appear.

Once you have clicked "add the file" you will see a box at the bottom of your file saying "Place inline". Position the cursor where you want the pic to go and hit "Place inline" which means you can have the photo(s) within the body of the words. I'll pop a photo in here...

Folding Boat.jpg (2.3 KiB) Viewed 1869 times

And then submit.

Took me a while to figure it out.

Hey!

[Collector Inspector]

AH, I have got the gist of it Hugo, thank you Mate!

I will try that next post "Side Trip Boatman Single"

Cheers

B

[Collector Inspector]

OK, I pulled the "Big Bore" ripper apart and , after having a very quick squiz at what was what......

The over bore looks a bit silly when std goes into over bore piston

bit much you say, I agree and found out why the thing would not run in water..........I am surprised that it ran at all, check this out

The over bore was not very well done in that very off centre. This bit was so thin it broke away short cycling crankcase vses transfer port pressures. The block is throw away off course.

No, there is no evidence that the wayward chunk broke inside the motor as everything is as it should be.

I now have made a decision as to replacement bits so see "Side Trip"

B[/color]

[Charles uk]

I think you'll find that chip won't affect anything, in fact many higher performance motors have that to shorten the gas flow path, when the transfers open before the piston clears the cylinder skirt.

The important bit is the height differences between the 2 pistons, wrist pin to transfer notch.

Take some pics so we can compare the 2 pistons, transfer & exhaust opening height wrist pin to skirt height when their sharing a common wrist pin.

[Collector Inspector]

Thanks for that Charles.

I choose not to have a modified and weak assembly on one of the rarest Australian Riptides Known, I would prefer my Boatman to be original, intact and above all completely sound mechanically.

This is one motor that there are no spares for period except for what I have as stated and maybe some complete example yet to surface for interested parties. Years of dedicated searching and I found this one by reading a random post?

I will not use this motor as a test bucket for experimentation in porting theory.

It will be back to as it should be and nothing less or more.

I am so lucky to own this old dear, I will do the best thing for it as best I can.

Aye?

B

[Charles uk]

Are they really that rare?
The cylinder design would lead you to think, this was built after the twin as a way of producing a cheapish single using spare cylinders that didn't sell, if they were designed as a stand alone the cylinder & crankcase wouldn't have needed that over complicated expensive inlet path!

[Charles uk]

Are they really that rare?
The cylinder design would lead you to think, this was built after the twin as a way of producing a cheapish single using spare cylinders that didn't sell, if they were designed as a stand alone the cylinder & crankcase wouldn't have needed that over complicated expensive inlet path!

[Collector Inspector]

Rare in that there are NONE known left.

Locksport Marine has a couple in a museum not complete and non running by last reports.

B