Considering "a full compliment" of engine/carb mods offered by RB Designs. I'm looking for feedback from those who have used this service. What do you think of quality of service? quality of work? Are some some mods better than others? Other thoughts or input? There is nothing really wrong with my motor at the present, just looking to refresh a good thing that is "a little tired".
EC 250 engine mods
- Thread starter DLS
- Start date
GMP
Active member
The head mod is definately worth it especially if your going into the top end anyway. I have not done the carb mod on my '07, only because it was easy to jet, happens to run perfect as is and is quite fast. On my '03 that was slightly more quirky about jetting I would have done it in a heartbeat.
gasser250sm
New member
i really want the carb mod but im in the UK! does anyone have an email address for RB ? amybe i could ship my carb over! thanks
sierrarider
New member
I'm very happy with the performance of my bike after having Ron modify both the carb and the head. Honestly, when I bought the bike, it wasn't jetted for my altitude and I didn't want to fuss with jetting.
My bike pulls clean through the rev range which is mostly what I was after. Ron also cut the head to give me a bump in compression which helps living at over 4000 feet.
Last weekends race had some high speed fire roads and the bike performed well there also.
I have yet to optimize the air screw adjustment but that is next.
My bike pulls clean through the rev range which is mostly what I was after. Ron also cut the head to give me a bump in compression which helps living at over 4000 feet.
Last weekends race had some high speed fire roads and the bike performed well there also.
I have yet to optimize the air screw adjustment but that is next.
nick790
New member
Why cant we get an RB agent?socalscott
New member
You could just add some fire to the combustion with the MC250(MX) CDI. The p/b isn't altered, but it is amplified. There'd be more available on both ends of the rpm range as well.
Personally, I found on trail tuned bikes, this trumps a lot of tinkering($/time) about.
That being said. Head mods are the best $ spent and it's the right thing to do.
Personally, I found on trail tuned bikes, this trumps a lot of tinkering($/time) about.
That being said. Head mods are the best $ spent and it's the right thing to do.
socalscott
New member
Since there's nothing wrong with your bike, simply dial in better head squishband gap via a thinner base gasket set next rebuild. This will deliver a good portion of the boost and efficiency of head work.
SLP offers easy to install $45 carb wings. Improves the low speed jetting and adds hard acceleration if the reed block area is not so efficient.
http://www.slp.cc/catalog.cfm?pageID=detail&catalogID=1&catID=50&productID=644
Again, you'll have a whole new feel to your tired old bike with a hotter CDI.
SLP offers easy to install $45 carb wings. Improves the low speed jetting and adds hard acceleration if the reed block area is not so efficient.
http://www.slp.cc/catalog.cfm?pageID=detail&catalogID=1&catID=50&productID=644
Again, you'll have a whole new feel to your tired old bike with a hotter CDI.
GMP
Active member
Its hard to quantify on two different bikes. My '07 runs very hard stock, where my '03 was somewhat of a dog off the bottom. The VF2 in low tension is biased toward this low end improvement, but mine retained good top end as well. The down side is reed life, after every season I found the edges frayed and chipped slightly. It was worth it in the '03 though. My '07 runs so good I'm not touching it. I think Kent A actually tested the VF2 vs. VF3 in the same '05 or '06 300, and found that the VF2 did give better low end. If you have an issue with soft low end power and can't jet it out or rectify it otherwise, give the VF2 a try if you can find one as they are out of production and replaced by the VF3. You might want to ask Mototassinari if and for how long replacement reeds will be available however, as you will need them.
Similar threads
