I have the RWR TM45 right now, and I was wondering if there would be any advantages to going back to the HSR 42 stock carb. I rarely ride WOT and like wheelies and pit riding. Would the stock carb improve these things? I know the stock carb drinks less gas...but any other good things??

Thanks

 

better mileage and easier thumb push. You will notice the bog is gone but the jetting is harder.

 

Okay, i'll rephrase that, what are the disadvantages along with the advantages?

I know I'll loose some power, but how much, and in what rev range?? And which carb would you recommend for trail riding, pits, and dirt roads.

Thanks

 

eh??

 

Why would you want to give up more power????
If your tired of the hesitation on the tm45 just dial it in. If your not using the accel. pump. Install it. That makes getting rid of the hesitation easier to dial out. I use a twist throttle, so no thumb issues.
I ride trail, fire roads, open desert & dunes. I would never go back to the stock carb. Not only will you lose power in all ranges. but throttle respose be will lost as well. And if you like to wheelie, you want throttle response. In fact you'll want that for all types of ridding.
I beleive once you have the carb dialed in correctly. You will never want to go back to the stock 42

 

just stay with the 45, it would be a step backwards, to go back to stock it cuts out if you wheelie very far it cuts out if you jump high and hit hard, other than there fine. no need to worry about the things you are concerned about, just search the forums and figure out how to fine tune the 45 and then practice on what you want to do better.

 

I do understand why you're considering it - that lag when you slam the throttle off idle sucks. no way to completely get rid of it without using the pump, and using the pump with a thumb throttle is not possible for any length of time. but you can work around it, just keep your rpms up enough to never allow the lag to be in your way.
I wish there was a better carb that gives it all, but so far no luck finding one. but I like my 45, and won't go back to the bsr42. maybe I should force myself to like a twisty, so i can activate the pump - its just that the people I know who had it hated it for the technical maneuvering we have to do where we ride. I really like the thumb.

 

the twist suck for me. Kills my forearm and tires me out. What a pansy I am... [img]i/expressions/face-icon-small-blush.gif[/img]

You will definitely lose bottom and mid. However, that might help the wheelie situation. High Tower is pretty knowledgable, but I would disagree with him on the hesitation thing. I believe that you can get rid of it with out the pump. I will have a better idea Saturday or Sunday. I am having some dyno work done, focusing specifically in the carb area. Most carbs stay at about 60 - 70% efficiency. That is to say, most people have it about 60 - 70% right. On a bike that produced 40hp RWHP, proper jetting could account for as much as 2 - 3 RWHP. I will let everyone including you Tyrespinner what the outcome is.

I would not go back to the 42. But the nice thing is, is that you can try it pretty inexpensively. Do you have your stock carb? If not, I'm sure one of us will let you use our olds carbs so you can do you're own "test & tuning".

However, you'd probably be responsible for shipping eh'

 

Ok, I will sum it up a little. I'm not sure if I'm running the pump (like I always say, I'm a dumbass and I know nothing), but what I do know is my thumb throttle pull is very very very stiff(that would probably mean I am running the pump, right?). Anyway, my TM45 was part of Stage 1 kit.

I would be willing to dial it in, but I have absolutely no carb or jetting experience...and I can't afford to pay 60$ an hour for someone to do it for me...Is there a guide somewhere...Also, I don't really know how to read plugs...(uh huh, i suck) I feel so dumb next to you guys...

Elliott from RWR is sending me a softer throttle spring but I don't know how much that will help, if at all. I know my carb is not dialed in because of that occasional "flooding" or whatever it is that I had posted about before and that lag from 1/8 throttle to WOT.

And yea, I have the old BSR 42 in a box. But if you guys say it can be dialed in to suit my needs, nevermind going back to the 42.

Would be nice to know things...

 

woods also has a book on jetting the tm 45. the stiff throttle is the cable, if you still have the stock cable put it back on. it doesn't have to be stiff. the dumbass part i don't think i agree with you ask to many questions to be a dumbass, you might be lacking experience but that you will gain by asking questions and tring and some times messing up, so no need to be hard on your self.