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  #1  
Old 03-10-2005, 09:32 PM
maf1188's Avatar
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Default YZ125 Low end power any help???

     

I'm sure some of you have this problem also but here it is. I've been trying to think of ways to improve my bottom end for a low cost because i'm only 16 and have limited funds and need some help so please guys!!! Thanks guys
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Old 03-10-2005, 09:38 PM
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Default Re: YZ125 Low end power any help???

And has anybody ever cleaned there powervalves and if so what do you do and what do you look for to see if they need adjusted? Thanks
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Old 03-10-2005, 09:43 PM
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Default Re: YZ125 Low end power any help???

If you can save the money or sell some stuff, I would get the v-force reeds and a full exhaust system , like the pro circuit. Thats what I had on my 04 yz 125, but i also had alot of motor work, but believe me the reeds and new exhaust will help alot.
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Old 03-10-2005, 09:50 PM
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Default Re: YZ125 Low end power any help???

I also recomend reeds but if you cant afford it you can change to lower gearing depending on what your at now. personally i use 13:52 and have good low and midrange without losing any top or having to shift to much
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Old 03-10-2005, 10:48 PM
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Default Re: YZ125 Low end power any help???

The advice put forward already is pretty well on the money.

The reeds are a good way of improving response and bottom-end. But to buy the set-up (V-Force), it will become a bit expensive.

The gearing is a cheaper alternative but you will lose top-end speed in each gear. So, the changing of gear ratios may help on some tracks, while make you change gears on others more.

Probably something you don't want to hear, but have you fine-tuned your jetting?
Although stock is pretty versatile, your elevation and weather may effect the fuel/air mixtures.

But then again, stock is sometimes not to far off. Usually a fair bit rich, people say that you can lean the main, pilot circuits out a bit.

I have a 00 model, and it has carbon fibre reeds, pipe, silencer and the bike ran cleaner after adding shorty and pipe. I could probably go leaner, but we are about to come into Winter so the richer jetting won't seem as bad and the bike should run cleaner.

Hope this help!
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Old 03-10-2005, 11:50 PM
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Default Re: YZ125 Low end power any help???

Yeah thanks guys for the help and yeah I can afford those things. I just meant I didn't want to keep hearing go get it bored and get the motor pumped out!! Because I rather go buy a pipe and silencer and some reeds first. But what pipe and silencer would you guys suggest? And what reeds would you guys suggest? And I was think about a 12 tooth front sprocket because my stock is 13 tooth and the getting a 48 for my back because my rear stock is 49, what do you guys think?
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Old 03-11-2005, 12:52 AM
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Default Re: YZ125 Low end power any help???

I would say the pc pipe and shorty 304 silencer, i used to have this one,and i felt the difference. check my profile, and look at my sig.
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Old 03-11-2005, 12:54 AM
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Default Re: YZ125 Low end power any help???

A lower tooth count in the rear will give you more top end, so you want to go to maybe like a 50t and see how it feels, then try higher if you dont like it.
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Old 03-11-2005, 01:01 AM
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Default Re: YZ125 Low end power any help???

Quote:
Originally Posted by maf1188
But what pipe and silencer would you guys suggest? And what reeds would you guys suggest?
Either FMF or Pro Circuit would show gains. From personal experience I would recommend FMF Fatty and Shorty silencer. Fatty boosts bottom-mid power. The silencer gives it a more of a hit right of the bottom as well as a crisper response. I am sure PC pipe and R-304 silencer would be good as well, but I am just going from personal experience.

As far as reeds, I would say go for Moto Tassinari V-Force reeds and reed block. I would check out the V-Force3 setup. http://www.mototassinari.com/

Quote:
Originally Posted by maf1188
And I was think about a 12 tooth front sprocket because my stock is 13 tooth and the getting a 48 for my back because my rear stock is 49, what do you guys think?
I was originally running 13-48 size sprockets. I wanted more bottom end (like yourself) and changed it to 12-50. This really brought the gears together. I like it at the beginning, but as I got better I felt like I was changing when I could be holding gears longer.

So I swapped my 12 front for a 13. This is how it is now and I like the way it is. It's a compromise between the wider stock gearing and shorter gearing.

Hope this helps. Let me know if there are anymore questions you may have!
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Old 03-11-2005, 01:18 AM
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Default Re: YZ125 Low end power any help???

I really rather get a FMF pipe and silencer because they sponsor me. Thanks
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Old 03-11-2005, 01:24 AM
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Default Re: YZ125 Low end power any help???

either way you'll notice gains over that stock exhaust system
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Old 03-11-2005, 01:30 AM
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Default Re: YZ125 Low end power any help???

Quote:
Originally Posted by idohcvtecexi
either way you'll notice gains over that stock exhaust system
Tru dat!
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Old 03-11-2005, 02:35 AM
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Default Re: YZ125 Low end power any help???

the stock exhaust system is just junk.
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Old 03-11-2005, 03:47 AM
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Default Re: YZ125 Low end power any help???

Quote:
Originally Posted by idohcvtecexi
the stock exhaust system is just junk.
The stock silencer is a chimney.

Although, the stock pipe is a pretty good all-round pipe. It revs slightly further than my Fatty, but then it doesn't have the bottom.
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