am i right in thinking that the standard throttle on a 4rt is slow action throttle? if so has anyone tried a fast one, and did it feel any different?

Hi, we run 2 4rt`s both with the twist grips changed to the fast action type. They run superbly, instant power and excellent grip,

regards

Howard

first of all ...howard, where did you get the fast actions and what are they called??

second, I 've installed a throttle from a 315 ...I like it, it does seem faster action, but was not sold to me as such.......maybe some monresa dealers out there know the difference ...........................masso

Domino throttles with black tube under the grip is slow action. White tube is fast action. Doesnt cost much..

Hi, yes as Manz has said the popular ones are made by `Domino` and are the ones that we use, they usually come as a kit including a set of bar grips and retail around

I have an aluminum Domino on a 315 and I guess it's a slow one. Total rotation is about 1/3 turn. I guess slow because I can't see how the spool part where the cable winds could be any smaller in dia.

Aluminum tubes are fast like the white ones.

Aluminum tubes are fast like the white ones.   

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I don't understand how it could slower? It looks like the spool diameter determines the cable take up rate, and on my aluminum tube the cable nipple socket is about 2mm from the tube and the tube is pretty thin. To make the spool part diameter less, the diameter of the bar and the throttle tube would have to be reduced. What am I missing?

On a fast action (white and/or aluminum) throttle the spool diameter is larger than the slow action ones. The larger diameter makes it possible to move more cable faster with less rotation of the tube.

you can get the same kind of action with a 44 tooth on the rear.............................masso

The ideal setup for the 4rt is to use the fast throttle and either a 44 or 46 tooth rear sprocket.

It appears you're trying to take the 'edge' off a slightly headstrong machine by gearing it down. Had you considered that the bike is already low geared? Check out the ratios in comparison to say a Gas Gas Pro. Best bet to slow the thing down is fit a programmable ECU & have it set on a softer setting. More expensive than an outsized sprocket but does the job properly, not just a workaround.

On a fast action (white and/or aluminum) throttle the spool diameter is larger than the slow action ones.

I have a 'SLOW' action 'ALUMINIUM' throttle, had it on my Beta, and now on my 4RT, and definately slow action

It is good to have the discussion of what's the best set up etc. etc. But everyone is different, what works for one person may not work for another and I am going through the process of testing all possibilities.

I have tried restrictors in and out, every combination, I have tried a bike with the programmable ECU, tried a bike with the titanium front pipe, different gearing, all are different and I suppose that is what is good about the 4RT, so many different bike set up over a 2 stroke.

You will eventually find the set up that works for you, not what works for eveyone else

Happy Testing

Edited February 14, 200620 yr by GIZZA5

Quote: Best bet to slow the thing down is fit a programmable ECU & have it set on a softer setting. More expensive than an outsized sprocket but does the job properly, not just a workaround.

You tried this then Perce?

I half fancied a 4rt last year but hated how the clutch worked & wasn't to keen on the fact that the thing was trying to cart me along half a yard quicker than I wanted. I also had a problem that it kept pumping my arms up in next to no time at all.

Anyway I tried an 06 bike just before Christmas, it had the 315 clutch master cylinder & a different handlebar set up. I was well impressed with it although it still was trying to run away with me a bit. I bought one & on the advice of a friend made sure it had the programmeable ecu on it which is set on a softer setting. It's certainly more laid back & suits me just fine. I've also got 5 1/2 inch renthals & Hebo footrests on it. Trying to work out what to do with the footrest hangers now as the stock item seems very soft & bendable.

I've bought the bike specifically to do ride 2 trials this year, ssdt & scott.