Third transfer port 66cc Because they currently go against all you suggest as being correct, they have 160+ psi and I've had some over 170 psi right out of the box!The exhaust ports now start at 26mm below the deck that's 154 degrees of duration,transfers have been raised to 30mm from deck that's 125 degrees duration with 13. Made May 15, 2013 · Hey guys just wanted to show what i did to my 66cc head . Jaguar, i though that the concept of piston ramps has been a long established principle with regards to manipulating the transfer port timing and exhaust port timing. I'm hoping to attach a picture or two in hopes that someone might know why it is the way it is. Oct 31, 2012 · Search titles only By: Search Advanced search… Mar 29, 2009 · JavaPipe: Tuned Pipe Designer Does anyone know the exhaust port angle and transfer port angle for a 66cc motor? By the way it is a boygofast if that makes a difference. Two Stroke Port Duration Port Timing Basics. Port 66 is a network port that is commonly associated with Oracle SQLNet, a proprietary protocol used for client-server communication in Oracle databases. Aug 9, 2014 · Transfer ports link the crankcase to the cylinder bore. So, like Jag said, I do believe at this point that I'll cut my expansion Nov 15, 2012 · I know 1. The compression ratio was again increased the Sprint's 7. Nov 5, 2020 · The third transfer port doesn't seem complete. Lets see what happens! Extensive cylinder porting with the Arrow intake plug allows for a much larger third transfer port. It was the piston with transfer port bevels that seemed to make a small difference over an unmodified piston without transfer port bevels. # Intake port (variable): Raised intake as booster-port # Transfer Ports 118. SQLNet enables remote access to Oracle databases over a network, allowing clients to connect to and interact with the database server. (Sometimes advertised as 80, but there only 66cc in reality) The minarelli's make good power, if ported correctly, as well as the bottom end matched (you gonna need to make a 3rd transfer port for the case reed) Oct 11, 2011 · change the transfer ports so that the fuel/air is directed more towards the rear of the cylinder. Nov 28, 2014 · so i bought the reed valve kit from arrow, im not 100% aware of what advantages the 3rd TP adds? also does it bypass the intake port? so as soon as the piston starts going twords TDC from BDC creating a burst of suction when the intake port is opened; is that burst of suction gone due to the 3rd Jul 28, 2020 · Building a new motor ,case reed ,polished crank ,balanced what's that?,polished crank case internally plus added a coat of hi temp enamel in the case for a smoother flow, port matched case to cylinder ,matched 2base gaskets to the port so no excessive gasket hangs over any port ,with the case reed thears no cylinder intake but a 3rd transfer I think before I invented the ramps the extension only boosted the low rpm power. 92 degrees of blow down stock. 7:1. Oct 20, 2023 · So im posting this to hopefully save the newbies some time. I made my own window piston but I need some clarification on how to make a third transfer. no, it's just like your transfers, the top of the boost port window on the cylinder wall and your piston crown determines the timing, just like the side transfers(old puch transfers were completely open, this didn't "short circuit" the charge like you're worried about. (This will only work with a reed valve). WIDER PORTED EXHAUST and 40mm PORTED INTAKE Do not use with reed valves. I had the engine running barely, no power under load, but also realized during disassembly that the engine had quite a bit of rust in the crankcase. Transfer Port Area Ratio 1) Transfer port diameter (or internal diameter) AND 2) Transfer port length AND 3) Transfer port orientation (is it a straight through hole, or an angled passage) They will flow differently and affect the static compression ratio So just going by size alone is only part of the picture. See "GTZ cylinder" for use in reed valve motors. Ive noticed many of the rookies ask the same questions about making their motors fast. Lower the head for more compression (or shave metal off the bottom of the cylinder). Fabian, naaaaaaa, I'm just looking for better torque out of this little beast. I'll update tomorrow when I add the pipe back and the booster port. Mar 20, 2020 · I am adding a reed valve to my engine and want to use a windowed piston and 3rd transfer port with it. 5° (165° duration): Oval # Blowdown: 21° Malossi 60cc (42mm) # Intake port 61° BTDC (122° open): oval # Transfer Ports 125° ATDC (110° open): 2 # Boost ports 135° (90° open): 2 Oct 12, 2014 · depending on the exact two port cases you have (some have a hollow at 12oclock where you need to grind out your third port) you may need to have some welding done on the cases aT 12oclock other than that yes just transfer the veloce cylinder and piston and cylinder head and base gasket also you need to tune your carby to suit Jun 29, 2013 · I have a 66cc motorized bike, I have done the mods on the motor, including: port match, a little of cylinder sand, NT speed carburetror, removed piston skirt. Swap out your stock cylinder for this fully ported cylinder today to maximize your engine performance with minimal investment. 6° (122. 75° duration): 4 ports + 1 wide booster # Exhaust port 97. Air/gasoline enters the engine from the carburetor at a ratio close to 15:1. Auxiliary Transfers Some cylinders have a minor set of transfers located between the front and rear sets. 2mm is a very small amount but with these small engines a small port height change can make a big port timing change. 5:1to 7. Any help will be greatly appreciated. I wanted to share with you this two pics, I just did that to the piston crown, I have read that those crown mods give to the bike more top end . This pipe has been extensively race tested and proven for optimal results. May 7, 2016 · The "boost port" also known as -in our case- the third transfer port (cut from the intake port, up, to the height of the transfer ports) increases the performance gained by creating another path for this extra intake charge (if you do indeed increase the intake timing) to get into the cylinder. Oct 14, 2016 · Cutting in the third transfer is not really a good idea, there are no gains to be had from it and it increases piston wear on the skirt getting really sloppy quickly and causing more issues. So I know it’s on the intake side but how far up do I go? May 9, 2020 · Decided to port my 1 piece 80/66cc motor This motor came with a fm80 crank, and really good transfer ports for a stock motor. Mar 4, 2021 · Im not good at understanding porting or the timing of the exhaust powerband and port timing like exhaust port timing and transfer port timing. Use my formulas to determine if the ports need to be widened or changed in their height. If anybody knows what port for my engine specs or any information to help me learn porting would be greatly appreciated! my speed goal is 50mph yet my engine currently cruises at around 35-38mph. Jun 24, 2012 · I've had great success with carving a third intake port & transfer hole in the piston. Jun 25, 2014 · I also need to trim off the little lip on the transfer ports so the corrected angles have more effect. The front set (2) of transfers is located closest to the exhaust port. the reason why the holes in the piston are small is to try and not This cylinder is a cheap and easy upgrade! Has OPTIONAL transfer port so it can be used with reed valve or without. Just something to keep in mind. It enters via the intake port (as the piston rises) into the crankcase and then is transferred to the combustion area via the transfer ports (as the piston descends and the piston top uncovers the port opening to the cylinder). The good points of the 69cc is that the intake timing is almost perfect at 118 degrees, and the intake area at the base of the transfers is larger than the other two cylinders which is important for top rpm power. A proper third fourth or fifth transfer has is own track in the casting so as not to interfere with the The big update with the Sprint Veloce was in the engine. Sep 11, 2021 · Should also note that the yd100 has a different spacing then the regular 66cc motors. The design was altered from the old two port design with the addition of a third transfer port on the top end. Now from there . intake match port to reed kit,exhaust open up and smooth out etc. Arrow’s racing snake pipe. Originally the model lacked turn signals. Jan 3, 2017 · CDH-G2 Racing Reed Valve Kit -Suitable for 40mm and 32mm Intake - 2 in1 - 66CC/80CC Gas Motorized Bicycle; Material:carbon fiber; suitable for 40mm intake and 32mm intake; better for 40mm intake; FYI: CDH-G2 REED VALVE WORKS WELL ON NORMAL PISTON AND CYLINDER, OF COURSE BETTER PERFORMANCE IF WORKS WITH WINDOWED PISTON. But i needed more. An explanation of the how the transfer ports on a 2 stroke cylinder work, along with tips for porti Nov 21, 2008 · A post in the Performance moped forum by Responsible Jon. Information about the transfer ports on 2 stroke engines. etc Oct 30, 2012 · In saying the port matching of the lower piston skirt to the intake port roof made very little if any power improvement over an unmodified piston. Hopfully this guide will help many achieve top performance from their stock 66cc This quick guide with pictures will show you how to make your stock or new 66cc 40mm stroke a powerhouse. So in conclusion, the wider exhaust port and semi-effective transfer angles Nearly make up for the lack of a reed booster port and expansion chamber. Rear Transfers The rear set of transfers is located closest to the intake port. nfm xuer llfyho mrmuqqtr murl wve mwsxg fzw acqivxs kpflir qwgp puifq mayrq ftyk bawzw