Expand the Powerband!

[westred]

Hey again guys , just doin' some research on 'go-fast' stuff trying to expand, or move a little of that "powerband hit" to the low end on this - new to me - 86 CR125R. What a blast , but it's my first 2-stroke "powerband" loaded machine so i'm looking for some suggestions.

I have heard that Boyesen makes some reeds that may do the trick - any info appreciated - their web site is quite lame. i have also been thinking about going down a tooth in the front sprocket and/or, up a few teeth in the rear sprocket. would gearing it down this way help?

I'm not trying to go faster, just get there quicker! :laugh:

any takers? thx much

 

[arjay]

It's not easy to move a 125's powerband around but gains can be had. To start with look at the exhaust and jetting. Check out low end pipes for that model year - Dynoport and DG. Get into the jetting - the profile of the needle can make a really noticeable difference to the power delivery. Jetting it right will give a broader spread of power, ie more pull from the mid range right the way through.. V Force reeds give a boost to low/mid. You could get the cylinder ported and the head reshaped for the right sort of boost. Eric Gorr is a great start point for advice, A flywheel weight will smooth out the hit and help prevent stalling.

 

[westred]

i just got a reply back from Boyesen from a mail i sent them before i found this forum . here's what they wrote:

hi , i am restoring an 1986 Honda CR125R and was interested in your reeds.
i notice a few diff kinds - i am loooknig for more low end power. do your reeds fit into stock cages?

Hello Kevin,

We offer Power Reeds, dual-stage fiberglass; PRO Series Reeds, dual-stage with fiberglass bottom & carbon fiber top; Super Stock Reeds, single stage in either carbon fiber or fiberglass.

The best reeds for low end power would be the Boyesen PRO Series Reeds. You would need part #PRO-43 and the price is $59.95 + shipping. These reeds will fit the stock reed cage on your 1986 Honda CR125.

Cheryl
Boyesen Engineering
8 Rhoades Road
Lenhartsville, PA 19534
tel # 610-756-6818 / 800-441-1177
fax # 610-756-4102

 

[keip82]

Don't Try It

 

[IndyMX]

Don't Try It

Why not?

 

[Moose]

'cause he's the reed guru from "new jesey"

 

[76GMC1500]

The Boyessen 2-stage fiberglass reeds will probably give you the broadest power, and they are more reasonably priced than other models. I would be supprised if you didn't already have a set of Boyessen reeds in that bike, though.

 

[keip82]

'cause he's the reed guru from "new jesey"

SORRY BUT I DIDN'T UNDER STAND U

 

[IndyMX]

SORRY BUT I DIDN'T UNDER STAND U

I believe he was trying to say, "What exactly is your experience with Boyesen reeds?"

 

[keip82]

I HAVE A GOOD EXPREINCE WIT boyseen reeds y

 

[Moose]

yes, indy has a canadian to american translator built into his head

 

[keip82]

O Okay

 

[IndyMX]

yes, indy has a canadian to american translator built into his head

From listening to the collection of Kanucks on here so much.. :whoa:

 

[IndyMX]

O Okay

So, answer the question, what is your experience and why should he not try it?

Please back up your one liner with some facts...

 

[keip82]

i had a experince doing the same thing on my cr80 did the same i had to drop it off to dealer to get it fixed but now it smokes 125's i have the cylerms manuale for the bike and still could do it there.....so if u want to do it then do it i don't care its not my bike.if you think its not fast or not enough powerband throw a hot rod crank rod in it that would do it.