Triumph Rat Motorcycle Forums banner

1 - 20 of 21 Posts

·
Registered
Joined
·
340 Posts
Good start...I went the CRK route and it was easy and I am very happy with the result. I did learn four things, three of which I did and one I realized too late.

#1 get the larger fuel tank, the small one looks good but at less than 100 miles range it makes life hard. I have the big one and I can go about 110 miles.

#2 I trashed the stock wiring loom and used the motogadget digital controller (eliminated relays, fuse block and a ton of extra crap) it was super easy to wire up and works a treat.

#3 I used a set of stick coils from a TT600 and it was beyond easy and they worked great. I cant explain it but the bike fires up and idles better than the OEM setup.

#4 I did not get the Roadster foot peg . I used the Cafe peg placement in my kit and in hindsight, I would have built the Cafe with Roadster foot pegs and roadster handlebars rather than clip ons.

As they say, results may vary and use your own judgement.

Best of luck and reach out if you have a question.
 

·
Registered
Joined
·
37 Posts
Discussion Starter #3
Just saw your photos in the running hot thread .... very neat solution for the temp gauge (I’ll be stealing that idea) would like to see more pics of your bike....
 

·
Registered
Joined
·
31 Posts
Boys you really make me want to save the spare parts carrier sprint and do a CRK conversion with it. i do think they look nice. Lupo, Can you tell me what the weight difference is if any before and after the build?

V
 

·
Registered
Joined
·
37 Posts
Discussion Starter #6
It must be a good deal lighter ... the Sprint body panels weigh quite a bit.... having said that the CRK subframe is heavier than the Triumph one...

I’m thinking about weight saving options like losing the sound baffles in the engine cases etc.
 

·
Registered
Joined
·
37 Posts
Discussion Starter #8
If you take off the clutch cover there’s a bunch of metal plates and sound insulation in there ... which I believe are baffles to reduce noise from the engine. There are some on the other side too...
 

·
Registered
Joined
·
340 Posts
I dont have solid numbers but I trashed the stock exhaust, the center stand, all the bodywork front side and rear, and airbox etc. I can tell you that it feels a lot lighter and the CRK site claims 20kg so what about 45lbs? I lost a little more because I ditched the dual exhaust. I can also tell you that the motor feels like I freed up 20hp and I know I didn't . I suspect Im at about 90 RWHP. which is only a little better than Triumph claims of 98 at the crank.
 

·
Registered
Joined
·
45 Posts
Hi Vecchio, So you got rid of the air box. How do you support the intake side of the carbs? I've never read of a performance increase when taking off the air box. I've noticed a difference in the handling when the fuel tank is full compared to near empty. How many gallons is the new fuel tank? Having a range of 150 miles would be okay, but 100 mile range is not enough as you said.
 

·
Registered
Joined
·
340 Posts
As far as the carb supports, they are firm in the intake manifolds and I don’t think they move around and nobody with one of these kits has ever complained. CRK sells a 3 port, single element foam (uni style) filter that utilizes the OEM velocity stacks with the stock vacuum chamber (hard to explain) and replaces the air box . It is not an all weather setup, I would not ride in the rain on purpose

The CRK fuel cell is 14 liters, and with the engine breathing so free and the temptation to ride like a hooligan I get about 110 miles to empty, if I just cruise I can squeeze close to 130-140 but that takes restraint. 35 mpg is achievable, 40 is a reach
 

·
Registered
Joined
·
340 Posts
Thanks for all the support and interest. Yes I finally achieved performance that feels exactly right with no hesitation, no flat spots, plus strong all the way to the red, and no popping on decel.

42 pilot (Idle) jet circuit with 2 1/4 turns

137.5 main jets (I did a lot of experimentation with 130/135/140/145 mains and I was very surprised to see just how much better it was with the 2.5 difference between 135-140.

OEM needles in the 3rd slot (middle)

My engine is stock internals, Motad 3 into 1 header and Venom Can. Also the CRK RamAir foam filter utilizing the stock intake boots (good design Ian)

I have yet to take it back to the Dyno center for a final number, but I know its better than the setup they put on me, they said they understood carbs but they are a H-D specialist so I think the idea of multi carbs was too much. I had to go back to the old way, the labor intensive way with all the trial and error.
 

·
Registered
Joined
·
37 Posts
Discussion Starter #14
Got all the old powder coat off of the fork lowers. Half an hour on the polishing mop and it’s looking promising. Think I need to use something a bit more abrasive to get rid of casting marks and corrosion then I’ll get back to the polishing
BF2F8B75-6A8C-42E4-A8A0-C54C821D6610.jpeg
 

·
Registered
Joined
·
31 Posts
I would like to do the same to mine, I like the look of polished aluminum. however since the whoel engine block, caps etc is chrome for some reason i think polishe fork legs will be over the top on top of all the chrome already being over the top
 

Attachments

·
Registered
Joined
·
37 Posts
Discussion Starter #17
Got some goodies from CRK last week. Trial fitted the subframe this afternoon.... all good so far 👍🏻
714889
D7E8CF6D-8D42-4DF9-9E48-498833C72E1B.jpeg
 

·
Registered
Joined
·
37 Posts
Discussion Starter #19
Yep it’s a runner .... had been stood for 12 years before I got it. ..... stripped, cleaned and rebuilt the carbs and it fired straight up.

The previous owner had already hacked off the subframe so CRK seemed like the obvious choice.
 

·
Registered
Joined
·
31 Posts
I am back at the shop after 2 weeks absence and will try to solve my 1100-3000 rpm issue coming weekend. I do suspect the CPU. Did you get a type of 90 degree angle screw driver for the mixture settings, turn them 2.5 turn out and left it at that or did you manage to access in another way?
 
1 - 20 of 21 Posts
Top