Without a doubt the 2013 RMZ250 is one of the best 250’s and was one of the top two of nearly every test rider in this years shootout. With that said you can always want more can’t you?
Who wants to leave well enough alone? The reality is that as fun as 250F’s are to ride they are even more fun with more power and improved suspension. At the same time we added a few mods for better durability and a few for looks. Our hope is that all of these mods would give us a big increase in power and handling while not loosing durability and so far we seem to be well on track.
The motor now is 269cc with a Cylinder Works big bore kit. This kit is a complete drop in kit that looks completely stock from the outside of the bike. Yes, no one but you will know. The Hot Cams Stage-2 cams were the next mod and they really help increase mid-top end power. The Hot Cams are designed to work well with the stock valve train and stock valve springs. This keeps the cost down and does not require as often valve maintenance as a full race team cam.
We also added in the new FMF Snap for added air flow to the engine and throttle response along with of course a FMF 4.1 full Ti system.
The stock mapping as is really good. We ended up using the grey (richer) coupler after testing in all three. When the motor was stock we ran the white leaner coupler. It was great that after all of the mods that no serious re-mapping was needed. The bike did not have any popping or bogging.
We did add a bit of VP U4.4 to help even a bit more and since we don’t have to worry about being legal we are ok with this as a fuel choice.
To finish off the motor we went to the one of the weaker spots for durability, the clutch. A full Hinson set up is exactly what we needed as we know they last for a long time.
To get this power all to the ground we are running the stock gearing which works great with the added power and Renthal chain and sprockets are the choice here.
TCR wheel sets are used by a ton of pros, they are very light and strong. Oh and they do look very cool. Of course Dunlop MX51’s work good everywhere and the new MX51 FA front is our new top choice.
Works connection clutch perch and bling pieces really set off the machine. The radiator braces provide a real benefit in crash situations and could help save a radiator.
Decal Works custom graphics are just cool and allow you to do what ever you want. MX plastics was able to help with some yellow and white pieces that really helps to brighten up the Suzuki.
The Suzuki turns so well stock we didn’t really feel there was a need to mess with triple clamps or linkages to try and help things. We just thought going after the suspension to fine tune it would be good.
Race Tech tackled the new SSF fork and shock for the RMZ and they felt that the front might be a bit harsh so they wanted to make it a bit more plush and compliant while still preventing bottoming. So, they added a compression and rebound Gold-Valve and re-valved all four circuits (low speed comp, high speed comp, mid valve circuit and rebound). While using the stock fork spring initially we switched out to the one softer fork spring of .96 kg rate
On the shock they were looking to get more traction while maintaining bottom resistance and keeping it stable. Installed Gold Valves and a stock rear spring was still used.
About every major product for this project can be obtained directly from Rocky Mountain ATV-MC: www.rockymountainatvmc.com
Cylinder Works www.cylinder-works.com 515-251-4070
3mm Big bore Cylinder Kit 269cc
Includes Forged Vertex Piston and Cometic Top-End gasket kit
Hot Cams www.hotcamsinc.com 515-402-8200
Stage two cam set
FMF Racing www.fmfracing.com 310-631-4363
Factory 4.1 RCT Ti Muffler
Ti Megabomb header
SNAP
VP Racing Fuels www.vpracingfuels.com 210-635-7744
U 4.4
Uni Filter www.unifilter.com 714-535-6933
Air Filter
CV4 www.cv4.net 800-874-1223
Formed Silicone Coolant hoses in yellow
High pressure radiator cap
Renthal www.renthal.com 877-736-8425
Stock front and rear sprocket
R1 Works Chain
997 Twin Walls
Dual compound grips
Dunlop Tire www.dunlopmotorcycle.com 800-845-8378
MX51 FA front 80/100-21
MX 51 rear 110/80-19
DeCal Works ww.decalmx.com 815-784-4000
Semi-Custom Graphics kit
Pre printed number plates backgrounds
Attack Graphics www.attackgraphics.com 800-336-5437
Gripper seat cover
Works Connection www.worksconnection.com 800-895-8292
Elite Perch
Factory II Stand
Front brake cap
Rear Brake cap
Radiator Braces
Chain blocks
Engine plugs
Oil filler plugs
Rotating font brake mount
Hour meter and mount
Hinson Clutch Components www.hinsonracing.com 909-946-2942
Inner Hub/Pressure Plate Kit
Billet Clutch Basket
Fibers, steels and springs
Outer Cover
Moto-Master www.moto-masterusa.com 800-749-2890
270mm Oversized Rotor/Adaptor Bracket 270mm OS Rotor -
270mm Adaptor Bracket -
Flame Rear Disc -
TCR Wheels— www.wheellacing.com 209 368-9800
Custom turned and anodized stock hubs
Race Tech www.racetech.com 951-279-6655
Suspension re-valve
Who wants to leave well enough alone? The reality is that as fun as 250F’s are to ride they are even more fun with more power and improved suspension. At the same time we added a few mods for better durability and a few for looks. Our hope is that all of these mods would give us a big increase in power and handling while not loosing durability and so far we seem to be well on track.
The motor now is 269cc with a Cylinder Works big bore kit. This kit is a complete drop in kit that looks completely stock from the outside of the bike. Yes, no one but you will know. The Hot Cams Stage-2 cams were the next mod and they really help increase mid-top end power. The Hot Cams are designed to work well with the stock valve train and stock valve springs. This keeps the cost down and does not require as often valve maintenance as a full race team cam.
We also added in the new FMF Snap for added air flow to the engine and throttle response along with of course a FMF 4.1 full Ti system.
The stock mapping as is really good. We ended up using the grey (richer) coupler after testing in all three. When the motor was stock we ran the white leaner coupler. It was great that after all of the mods that no serious re-mapping was needed. The bike did not have any popping or bogging.
We did add a bit of VP U4.4 to help even a bit more and since we don’t have to worry about being legal we are ok with this as a fuel choice.
To finish off the motor we went to the one of the weaker spots for durability, the clutch. A full Hinson set up is exactly what we needed as we know they last for a long time.
To get this power all to the ground we are running the stock gearing which works great with the added power and Renthal chain and sprockets are the choice here.
TCR wheel sets are used by a ton of pros, they are very light and strong. Oh and they do look very cool. Of course Dunlop MX51’s work good everywhere and the new MX51 FA front is our new top choice.
Works connection clutch perch and bling pieces really set off the machine. The radiator braces provide a real benefit in crash situations and could help save a radiator.
Decal Works custom graphics are just cool and allow you to do what ever you want. MX plastics was able to help with some yellow and white pieces that really helps to brighten up the Suzuki.
The Suzuki turns so well stock we didn’t really feel there was a need to mess with triple clamps or linkages to try and help things. We just thought going after the suspension to fine tune it would be good.
Race Tech tackled the new SSF fork and shock for the RMZ and they felt that the front might be a bit harsh so they wanted to make it a bit more plush and compliant while still preventing bottoming. So, they added a compression and rebound Gold-Valve and re-valved all four circuits (low speed comp, high speed comp, mid valve circuit and rebound). While using the stock fork spring initially we switched out to the one softer fork spring of .96 kg rate
On the shock they were looking to get more traction while maintaining bottom resistance and keeping it stable. Installed Gold Valves and a stock rear spring was still used.
About every major product for this project can be obtained directly from Rocky Mountain ATV-MC: www.rockymountainatvmc.com
Cylinder Works www.cylinder-works.com 515-251-4070
3mm Big bore Cylinder Kit 269cc
Includes Forged Vertex Piston and Cometic Top-End gasket kit
Hot Cams www.hotcamsinc.com 515-402-8200
Stage two cam set
FMF Racing www.fmfracing.com 310-631-4363
Factory 4.1 RCT Ti Muffler
Ti Megabomb header
SNAP
VP Racing Fuels www.vpracingfuels.com 210-635-7744
U 4.4
Uni Filter www.unifilter.com 714-535-6933
Air Filter
CV4 www.cv4.net 800-874-1223
Formed Silicone Coolant hoses in yellow
High pressure radiator cap
Renthal www.renthal.com 877-736-8425
Stock front and rear sprocket
R1 Works Chain
997 Twin Walls
Dual compound grips
Dunlop Tire www.dunlopmotorcycle.com 800-845-8378
MX51 FA front 80/100-21
MX 51 rear 110/80-19
DeCal Works ww.decalmx.com 815-784-4000
Semi-Custom Graphics kit
Pre printed number plates backgrounds
Attack Graphics www.attackgraphics.com 800-336-5437
Gripper seat cover
Works Connection www.worksconnection.com 800-895-8292
Elite Perch
Factory II Stand
Front brake cap
Rear Brake cap
Radiator Braces
Chain blocks
Engine plugs
Oil filler plugs
Rotating font brake mount
Hour meter and mount
Hinson Clutch Components www.hinsonracing.com 909-946-2942
Inner Hub/Pressure Plate Kit
Billet Clutch Basket
Fibers, steels and springs
Outer Cover
Moto-Master www.moto-masterusa.com 800-749-2890
270mm Oversized Rotor/Adaptor Bracket 270mm OS Rotor -
270mm Adaptor Bracket -
Flame Rear Disc -
TCR Wheels— www.wheellacing.com 209 368-9800
Custom turned and anodized stock hubs
Race Tech www.racetech.com 951-279-6655
Suspension re-valve
