Guys,
The other night I read the thread from Racetech about their shocks, springs, etc. I also read the prices that they were charging, an also the responses from the Forum. Please don't misunderstand me, I am a fan of Racetech products, but it underscored an issue here, with this $3000.00 motorcycle that we all like. It would be pretty easy to double the cost of this bike with aftermarket parts.
Ok, where am I going with this thread. I have been designing a modified cylinder head to compliment the 170cc big bore kit. Well my first thought was to port the head the way that I want it, max'ed out, lots of hand labor, over the top. Normally that approach will give you 90% to 95% of what you want. But for way less hand work, a little more machine work, I could have 80% to 85%, for a lot less money. Here's the kicker, unless we are at the drag strip, or on the Cycle World dyno, you or I would never feel the difference. There maybe 1 or 2 MPH difference, when I just added 10 15 MPH to the bike with the bore kit. This bike will fly with 170cc's. So why not sell a ported head for about $200.00 less labor.
I have the over the top head finished, using stock valves. It will be flow tested by Tuesday. Then I'm going to install 1mm larger valves & reflow it. Then I'm going to finish the 85% heads, & flow them with stock & +1mm valves. Honestly, I'm guessing that there will be very little CFM difference. My goal here is to keep the labor price as low as I can, but still have a modified head that really works with the 170cc kit. I'm not made of money, any more than you guys are.
Make Sense?
Brian
PS, Now if you decide to go racing, that's another story, we'll have to talk.
The other night I read the thread from Racetech about their shocks, springs, etc. I also read the prices that they were charging, an also the responses from the Forum. Please don't misunderstand me, I am a fan of Racetech products, but it underscored an issue here, with this $3000.00 motorcycle that we all like. It would be pretty easy to double the cost of this bike with aftermarket parts.
Ok, where am I going with this thread. I have been designing a modified cylinder head to compliment the 170cc big bore kit. Well my first thought was to port the head the way that I want it, max'ed out, lots of hand labor, over the top. Normally that approach will give you 90% to 95% of what you want. But for way less hand work, a little more machine work, I could have 80% to 85%, for a lot less money. Here's the kicker, unless we are at the drag strip, or on the Cycle World dyno, you or I would never feel the difference. There maybe 1 or 2 MPH difference, when I just added 10 15 MPH to the bike with the bore kit. This bike will fly with 170cc's. So why not sell a ported head for about $200.00 less labor.
I have the over the top head finished, using stock valves. It will be flow tested by Tuesday. Then I'm going to install 1mm larger valves & reflow it. Then I'm going to finish the 85% heads, & flow them with stock & +1mm valves. Honestly, I'm guessing that there will be very little CFM difference. My goal here is to keep the labor price as low as I can, but still have a modified head that really works with the 170cc kit. I'm not made of money, any more than you guys are.
Make Sense?
Brian
PS, Now if you decide to go racing, that's another story, we'll have to talk.
