Posts
169
Joined
9/16/2014
Location
AU
Edited Date/Time
10/4/2014 11:44am
just wondering what i could do to my 2008 yz125 to make it a little faster, or a lot faster. i don't want to bore it out.
When i was riding in 125cc I had a YZ
I have BUD RACING exhaust withs a V-Force 3
But I think if you want a really perfect YZ and if you have money
You can prepar the engine
Put a exhaust
Change front suspension ( WP con valve for me is the best or Ohlins )
Put a V-Force 3
Is my opinion maybe you don't like
I'm a 125 lover, I can't get off of them. I've had good luck with putting Boyesen Pro Series reeds in the stock reed cage, vs. the V-force 3 route. It's cheaper, and I can't notice a difference between the two systems.
Pipe-wise, I've always preferred Pro Circuit over FMF. I've had far better results with PC personally. Check out Bill's Pipes though, I've seen +4 HP over a PC pipe on certain systems from them.
If you're still not happy, I would send your cylinder and head to Eric Gorr for his Mo-Betta porting package. It's a broader, easier to ride powerband that makes power everywhere, and he is very reasonable. You could do the top end focused porting, but low end will suffer, and it will be harder to ride.
My best advice: keep the thing stock and get faster corner speed. YZs have AWESOME 125 motors. I would do reeds and a pipe, get your jetting dialed in, and ride!
Enjoy!!
The Shop
DeCal Works Huge Plastic Inventory of UFO and Polisport kits.
Luxon 4-Post Bar Mounts
$189.95 - $239.95
Port and polish
Head machined for race gas
PC pipe and R304 silencer
No heavy wheelsets or HD tubes
Most important jetting!
As far as the motor - Pipe, Port and head mods, carb mod and good race fuel such as VP VPR. If that's not enough you can have the cases matched, coat trans and ceramic bearings.
Call Bobby Barr at barrscompetitiion.net
He built bikes for RC, Jeff Stanton, Mike Jones, Cooper Web etc.
Good Luck!
Todd
Basically, it depends on your ability. If you're a very fast rider - go with PC. If you're a weekend warrior like us, go with the FMF.
On mine I have FMF Factory Fatty, FMF powerCore muffler (not the shorty), Boyesen Pro reeds on stock cage and jetted 400/42.5. Rips pretty good.
im thinking FMF fatty with titanium 2 muffler with vforce3 reeds
The Titanium-2 is the same muffler as the shorty but with a titanium stinger and end cap. I had a shorty on before. I like the Powercore-2 better. It spreads the power out more and gives better overrev. The shorty is more punchy and you have to shift more quickly and more often.
I also tried the V-Force 3. I had horrible luck getting the thing to seal. It created an air leak. If you use the V-Force make sure you use a good gas-resistant sealant on all mating surfaces.
so i should chuck in a 40?
- Send engine to Watts Perfections (complete engine)
- PC Pipe and Shorty
- Vortex Ignition
- V Force
- GYTR Clutch
Pit Row
If I remember correctly, the previous YZ125's, say 1996-2004 era, did run a richer pilot jet. That was a completely different engine.
2) Keep the motor fresh
3) Weigh 150 or less
4) Become an expert at keeping momentum
5) Become an expert at shifting precisely
6) Maybe porting if you don't want to bore cylinder
7) Have reeds in perfect working order/good reed cage
8) smile and go weeeeeeee
quicker, install 144 kit
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