YZ 125 Loretta's

jacob.a.bruce
Edited Date/Time 2/20/2015 9:06pm
Building a Yz for llq area and regional and hopefully lorettas this year... wanting some input in what i should do
|
Jim Lahey
Profile picture for user Jim Lahey
Posts
164
Joined
1/25/2015
Location
CA
Jim Lahey 2/19/2015 4:52pm
2/19/2015 4:52pm
step 1: remove gas cap

step 2: discard yz125

step 3: install yz250f

step 4: re-install gas cap

step 5: ???

step 6: profit
respect_the_beast 2/19/2015 5:09pm
2/19/2015 5:09pm
Jim Lahey wrote:
step 1: remove gas cap

step 2: discard yz125

step 3: install yz250f

step 4: re-install gas cap

step 5: ???

step 6: profit
Now that the special kid has spoken...

Cool. What class, schoolboy?
jacob.a.bruce 2/19/2015 7:19pm
2/19/2015 7:19pm
Yea buddy i don't think a bike would fit in my gas tank and yea schoolboy

The Shop

See All »
FGR01
Profile picture for user FGR01
Posts
5112
Joined
10/1/2006
Location
AZ US
Fantasy
1222nd
FGR01 2/20/2015 6:37am
2/20/2015 6:37am
FMF pipe, FMF power core silencer (not the shorty), Boyesen Pro Reeds, Head cut to correct squish, race gas. After that get the jetting right (I am at 42.5 pilot and 400 main with stock needle) and then gear it to get the shift points how you like them.
HenryA
Profile picture for user HenryA
Posts
3789
Joined
12/29/2011
Location
Stockholm SE
HenryA 2/20/2015 6:46am
2/20/2015 6:46am
FGR01 wrote:
FMF pipe, FMF power core silencer (not the shorty), Boyesen Pro Reeds, Head cut to correct squish, race gas. After that get the jetting right (I...
FMF pipe, FMF power core silencer (not the shorty), Boyesen Pro Reeds, Head cut to correct squish, race gas. After that get the jetting right (I am at 42.5 pilot and 400 main with stock needle) and then gear it to get the shift points how you like them.
What's wrong with the shorty?
FGR01
Profile picture for user FGR01
Posts
5112
Joined
10/1/2006
Location
AZ US
Fantasy
1222nd
FGR01 2/20/2015 7:25am
2/20/2015 7:25am
FGR01 wrote:
FMF pipe, FMF power core silencer (not the shorty), Boyesen Pro Reeds, Head cut to correct squish, race gas. After that get the jetting right (I...
FMF pipe, FMF power core silencer (not the shorty), Boyesen Pro Reeds, Head cut to correct squish, race gas. After that get the jetting right (I am at 42.5 pilot and 400 main with stock needle) and then gear it to get the shift points how you like them.
HenryA wrote:
What's wrong with the shorty?
Nothing wrong with it. I have both but I prefer the regular length Power core. It kinda splits the difference between the shorty and the stock silencer. The power is more barky with the shorty, as in, it runs through the revs quicker and then drops off more abruptly. You have to be more precise with your shifts and shift more often. Might be better for tighter courses. The regular power core gives better overrev and allows you to hold each gear longer. For example, you can wind out 4th gear on some straights that the shorty might require a shift to 5th which then is one more downshift you have to do for the corner.
Falcon
Profile picture for user Falcon
Posts
10108
Joined
11/16/2011
Location
Menifee, CA US
Fantasy
798th
Falcon 2/20/2015 2:16pm
2/20/2015 2:16pm
See, I preferred the shorty on all my YZ125s... I felt like you had to tap-dance on the shifter on a 125 anyway, so why not get the most ooomph out of it while you're accelerating? Unless you have a lot of tracks with long straights that you are tapped out in 6th gear, use that gearbox and shift it. One man's opinion.
respect_the_beast 2/20/2015 2:59pm
2/20/2015 2:59pm
I had Tom Morgan at TMR port and mill my '09 125's top end. The difference was night and day. If you have to keep it a 125, give Tom a call. www.morganracingengines.com

He's Wardy's old mechanic, and also built the engines for Blackfoot Honda and more recently Babbitt's Kawasaki.
OR Racer46
Profile picture for user OR Racer46
Posts
1334
Joined
11/24/2014
Location
Eagle Point, OR US
Fantasy
876th
OR Racer46 2/20/2015 9:06pm
2/20/2015 9:06pm
Spend all your money on suspension . A pipe is not going to get you to LL

Post a reply to: YZ 125 Loretta's