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Author Topic: Getting back into the game  (Read 8214 times)

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Offline MOMSMX47

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Getting back into the game
« on: November 30, 2012, 04:22:30 PM »
After four years away from the sport I am finally getting back into racing. I spent two years on a four stroke and hated it with a passion, the whole valve thing took the fun away from things for me, I really missed my "roots" of just going out and having fun and ripping it on my two stroke so I went through and put through a deal for a 2013 YZ 250   should be in just a matter of days at this point i'm told, already have all the parts waiting for her .  The list below is what I've put into it. Planning on having my co-workers here at the shop put in a port job on it as well as having the suspension revalved to my specs.  Other than that, what other suggestions do you guys have for this thing. I've ridden Red my entire life and this is my first time EVER riding blue so any help is appreciated.

FMF Fatty
Powercore 2 shorty silencer
Pro Taper Contour Reed bend bars
Pro Taper Aluminum Throttle tube
Fork bleeders
Works conn. Rad. braces
Factory Effex gripper seat cover
Cycra Speed skid plate
ARC Unbreakable levers
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline factoryX

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Getting back into the game
« Reply #1 on: November 30, 2012, 04:26:14 PM »
Add Vforce or  boyesen reeds to the list as well. Cleaning up the porting wouldn't be a bad thing either.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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I ride an 03 yz250, wait 04, wait 05, what ever, they're all the same #$@% YOU!

Offline _X_

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Getting back into the game
« Reply #2 on: November 30, 2012, 04:28:20 PM »
good on ya moms!
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline MOMSMX47

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Getting back into the game
« Reply #3 on: November 30, 2012, 05:33:22 PM »
was thinking of the boyesen reeds but I never was able to figure out what kind of power gain you got out of these
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline factoryX

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Getting back into the game
« Reply #4 on: November 30, 2012, 09:54:03 PM »
1-3 hp through out the rpm range. They work great. Cleaning up the porting would make it even better.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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I ride an 03 yz250, wait 04, wait 05, what ever, they're all the same #$@% YOU!

Offline MOMSMX47

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Getting back into the game
« Reply #5 on: December 01, 2012, 02:44:11 AM »
I have someone at my work that does porting he is excited to get into it and see what he can do ,  have you done port jobs on the YZ before and if so do you have advice what to do or stay away from as far as porting?
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Offline factoryX

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« Reply #6 on: December 01, 2012, 03:04:47 AM »
No, I will be having mine cleaned up though after this winter. Cleaning the casting flaws will create better flow there for more power. There are people on here with experience with porting that should be able to chip in with more info.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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I ride an 03 yz250, wait 04, wait 05, what ever, they're all the same #$@% YOU!

Offline Stusmoke

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Getting back into the game
« Reply #7 on: December 01, 2012, 12:55:45 PM »
Might I suggest that you also get some head mods done for a little more compression while you've got your motor at a mechanic? Compression = power. It seems that you're concentrating your mods to get more low to mid power. Good call, 250s are monsters bone stock, adding overrev is crazy if you ask me. My 01 YZ250 being revved, with bald ass tires, stock expansion chamber and no engine mods that I'm aware of is... unsettling. Fun, if only because your blood just got six litres of adrenaline pumped through it :P. Mid range power is also alot more tractable and controllable which is a huge advantage in terms of fatigue and traction.

Looking forward to some pics mate.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline MOMSMX47

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Getting back into the game
« Reply #8 on: December 01, 2012, 01:54:51 PM »
BINGO!!!  I had a few people that wanted me to add all kinds of stuff that will give it all kinds of top end speed,  at the end of the day that would NEVER be useable power for me because the tracks around here combined with my riding ability/style  never allow for that.   At the end of the day I want a bike that is going to have max potential in all the areas I'm actually going to see the difference in.

I was suggested to think of a flywheel weight for it btw,  thoughts?
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Offline factoryX

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« Reply #9 on: December 01, 2012, 03:14:00 PM »
As flat and straight as tracks are today that over rev will save you on the straights. You could try a 36mm PWK, people are doing to their 02 up cr250's with great success for low end pull with out losing top end. As for porting, what I suggested would simply improve power all over, not drag port status. Head mod on this year is also crucial in that yamaha lowered compression in 2011.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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I ride an 03 yz250, wait 04, wait 05, what ever, they're all the same #$@% YOU!

Offline MOMSMX47

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Getting back into the game
« Reply #10 on: December 01, 2012, 06:03:37 PM »
Great!  Keep the advice coming, I will be talking to someone this week on what we can do to the head,  first and foremost I want to ride it with the mods I have on it now and get comfortable on it and analyze what it needs.  This will be the first time I have resources available to me to make changes on the fly like that so I'm certainly going to take advantage of it if I can
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Offline Stusmoke

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Getting back into the game
« Reply #11 on: December 02, 2012, 12:22:41 AM »
Quote from: WTFactoryX on December 01, 2012, 11:14:00 PM
As flat and straight as tracks are today that over rev will save you on the straights. You could try a 36mm PWK, people are doing to their 02 up cr250's with great success for low end pull with out losing top end.

This is a fair point. Where you should focus your power is greatly influenced by your track(s). I'll leave the decision up to you but you should still be able to pull the 250Fs on all straights even if it signs off at 9 grand. Its not like the YZ125 that pulls and pulls and pulls till redline.

With regards to the flywheel weight, it really depends on the track. I wouldn't want to slow down my bikes revs in the slightest unless the track demanded it. Hard packed dirt is where a flywheel weight will be worth its weight in gold. But when the dirt gets softer you'll be wishing it would disappear.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline _X_

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« Reply #12 on: December 02, 2012, 01:22:54 AM »
i have to agree with stusmoke, having tested a fly wheel from hard pack and loam to sand it only feels right on the hard stuff.
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Offline TMKIWI

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Getting back into the game
« Reply #13 on: December 02, 2012, 06:45:29 AM »
A flwheel weight does not loose you power anywhere in the rev range. That includes top end.
All it does is slow down the "Hit" when you get in the powerband.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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If you don't fall off you are not going hard enough

Offline Stusmoke

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Getting back into the game
« Reply #14 on: December 02, 2012, 06:49:46 AM »
Quote from: TMKIWI on December 02, 2012, 02:45:29 PM
A flwheel weight does not loose you power anywhere in the rev range. That includes top end.
All it does is slow down the "Hit" when you get in the powerband.

I know, I wasn't saying that it did. I didn't meant to anyway.
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