If you are going to the trouble of a new ECM, then you should probably buy the race head that a few places are selling. Then you shouldn't need to do any porting. I'd also suggest going with a higher compression piston and cam, might as well get everything you can get out of the stock bore and stroke.
I'd like to keep the spare I bought, but if it really comes down to it, I could let it go for what it cost me. But consider the race head as something that might be a better choice.
I would check with Man in the Box and see if the head they sell will work with the stock bore, pretty sure it has bigger valves so they may not clear the cylinder walls. Someone else had a race head for the stock bore, but can't remember who had it.
Also can you post some pictures of what went wrong when you were porting? Like to see where mistakes are made so I can try to avoid them. Wondering if your head could be welded to fix the problem.
The only problem with drilling it and welding it agin is the other side is the spring seat and would be a headache to straighten out, I am going to ride it the next few days if the smoke comes back I am probably going to order a new guide, have the spot rewelded and install the guide, but i am still looking for another stock head for cheap lol
Greg_E touches on the subject in this thread & it is likely somewhere on the forum in bulk or fragments but I haven't seen it clearly stated; the dilemma for me right now is cost to benefit. What I am looking for is to gain what I will call "usable" power to:
1. Be able to cruse at 55-60 mph sitting upright with slightly lower rpm's ( through gearing change).
2. Overcome the occasional hill w/o getting run down by traffic.
3. Lift the front end easier.
Would I be able to get this with the base 143cc kit and TB head from Steady Garage w/o exhaust, fuel controller and other additional mods? We have all seen impressive dyno charts posted but they are usually box stock vs full out mod with big bore kit.
It looks like the 143cc kit will meet my immediate needs and can be something to expand on directly over time. Now to pull the trigger. Summer is going quickly and I need to strike a much better work/life balance and enjoy more of what we are all here for.
I'm looking for a couple of damaged TB stroker cranks for a new project I'm working on. PM me with a photo of what you have and what you want for it so I can see if it is suitable. This one only has a bent rod and is perfect. Thanks in advance.
Dog ate my rear turn signals and the small plastic piece that covers the license light.
Anyone have any factory ones that they took off to upgrade?
Please text me at area code 910.
Hey everyone! I'm in need of a stock front left turn signal assembly.
I figure someone has to have one laying around. It seems most people get flush mount turn signals so hoping this will be easy.
Let me know!!!
While going through my bike this spring, I see my rear wheel has a bend in the lip. I don't know why it took me so long to find it... but now that I did, I need to replace the wheel.
Anyone have a rear wheel they want to sell?
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