Dick Mann DR 370 frame

[EML]

The XS strokers use a base plate the same width as 1 chain link, add 2 links and every thing else stays the same.

[SON]

and a positive chain guide ala Speedway engine and it all just works.
Powroll usually used squashed conrods, then for certain models like the 605cc TT500 they had shorter rods made by the OEM, looked so original that I even sent a disappointed email to complain,
I still apologize for that mistake,
I am still waiting on a reply from Powroll to see if they will do some for the DR400.
Also how good is that Curtis Frame? Makes Hallmans, C&Js and most others agricultural.

[firko]

Here's a way to get your DR handling...fit a leading link DKW front end.
                                                                             

[cloggy]

 370 frame is really good on the road, used by Vic Camp for road racing training back in the day, but it's pretty bad offroad. DR400 is a lot better but it's too slack on the front end, and due to clearance issues  about 1 degree is all they pulled it in when racing in the USA 4 stroke championships

[Tony T]

Here's a way to get your DR handling...fit a leading link DKW front end.
                                                                             

NOOOOOOOOOOOOO!!!!!!!!!!!   

[cloggy]

 Last winter I bumped into a german whilst entering the twinshock UK show. turned out he had a ProFab HL and a NV HL, said they were chalk and cheese. ProFab was just a much classier; the difference between a bespoke top end frame and a production frame

[SON]

The ProFabs are top quality as are their swinging arms, but that Curtis or the KSIs are a step above.
Does anyone have a photo of the Curtis less bodywork?
Thanks

[VMX247]

Does anyone have a photo of the Curtis less bodywork?

http://www.geoffmorrisconcepts.com/
perhaps contact GMC on this forum who is in Victoria Aust.
or
Here is half a candy apple naked lady..UK based production 
http://ozvmx.com/community/index.php?topic=23542.msg230787#msg230787

[ola_martin]

Don't have of the Suzuki frame, as there's only one...
But here's the more common XL500 frame, it's basically a HL without the oiltank. The Suzuki frame is shorter.

[SON]

Thanks for posting those photos,
You can see the Aberg copy bits,
Looks even better in Nickel,
I am doing a RM N / DR 400 conversion at the moment but that should be black,
Might Nickel the GMC ??

[ola_martin]

The Hallman frame looks like it's almost the same as the HL, just with a lowered cradle and without oiltank, looks to be lots of room in front and back of the engine.? I guess Geoff knows this?

The Curtisframe for the Suzuki have a shorter top tube, to make it closer to the engine, looks much better in my opinion. Less "homemade"....
Bit of the same with the NVT vs. ProFab frames for the HL, you can clearly see the front engineplates beeing much bigger on the NVT.... 

[SON]

Martin you have access to some trick stuff, particularly those bare frame photos,
Do you have any of a RM/SP/DR/GN400 graft at an early or stripped stage?

[GMC]

It’s no coincidence that the Curtis frames look like the NVT HL’s
Curtis built the HL frames for NVT and I assume that when the Yamaha contract had run its course he turned his hand to the Honda and Suzuki engines.

I often wondered if Profab made the aluminium swingarms for NVT.
The 79 NVT swingarm looks very similar to the US Profab / Hallman frames.
I’m guessing that Curtis made steel swingarms so he could build it all in-house

[SON]

Geoff I am sure you are right,
Thanks for posting the Hallman Suzuki photo,

[ola_martin]

It’s no coincidence that the Curtis frames look like the NVT HL’s
Curtis built the HL frames for NVT and I assume that when the Yamaha contract had run its course he turned his hand to the Honda and Suzuki engines.

I often wondered if Profab made the aluminium swingarms for NVT.
The 79 NVT swingarm looks very similar to the US Profab / Hallman frames.
I’m guessing that Curtis made steel swingarms so he could build it all in-house

That's correct, I've even heard that he buildt them in his spare time, parallel with the NVT frames. He also built Curtis Yamaha frames, wich is about an plated HL, with some small modifications and steel swingarm.
The SP 370 one is a one of project, built as an endurobike for him self. I know who owns it, I'll ask him for "naked" photos...


Geoff, is the outer dimesiones of the Hallman Suzuki about
 the same as the Hallman Yamaha?