In this video i show you how to finger port and epoxy fill a set of Yamaha 701 62t cases. Thanks for watching. Please subscribe to our channel / ericksonsmandp / ericksonmap247 www.iride247.com
Great video covering a lot of the details in the case porting process. I like how you showed the ported side and the stock side for comparison. I'll keep my eye out for the next video, keep up the good work!
I got a set of ported 61x cases from you a few years back, if all goes well I’m finally going to have the ski on the water this year, and wait to try out the engine!
I sure wish I would have sent my 701 cylinders to you. I sent mine to someone else 4 months again, and I’m still waiting on it. Crazy! Shouldn’t take 4 months to bore this. Great videos
To Bore and hone is 10 to 14 day turnaround if not less. .sorry to hear its taking that long. I have 5 boring bars to be able to do multiple jobs at the same time
Hey! great video! Just a friendly suggestion, usually its being done in sillicone molding but im pretty sure it work pretty well with epoxy filling. before you pour it, take a small paint brush and paint with epoxy the surface, this way it will stick 100% and air bubbles will have no chance! cheers!
I appreciate the videos they’ve been a great resource in porting and port matching the transfers on my 61x/x motor. Could you do a video or explain case porting a x motor? There’s so little info out there on doing this vs the t cases. Is it even worth it on a mild 185psi motor with a single 46?
Love all the vids and thanks for putting this info online! I'm having you do some machine work on my 701 asap. Question though, Would the same principles of 2 stroke cylinder and case porting in your videos apply to a single cylinder YZ250 2 stroke?
Yes the only difference is the the reeds are in the cylinder not the cases. I will be doing a 550 cylinder porting video shortly and that will be even closer
Im putting together a 62t bottom 61x topend. I will be running a b pipe with limited chamber, dual sbn 38s, milling the head or i will buy a aftermarket one. Would just this mild build stand to benefit from this? Im on a WDK rok hull so i spend most my time in the surf and some flatwater tricks.
What is the downside to making the fingers larger than what you show here (all the way to flush with the intake area as well as removing the hump on the bottom)? What are your considerations to ballancing the finger sizing? Thanks for all the videos and free education!
That depends on displacement. 701-760 you don't want to make to big or you hurt case volume ( hurting bottomend grunt) For these engines.to make optimal power the ports need to flow with Velocity. It's the goldilock thing. It needs to be the right size. Not to big or small. ( that's the hard part to learn and when a flow bench helps ) bigger isn't always better.
@@EricksonMachinePerformance The first one I might have gotten a little carried away but I filled the reed area, so maybe it won't be too bad (85mm w/ stock stroke)? I had watched your video on filling the lower intake area and that's the picture I had in mind when I went to town on the case. When I came back to this video, I realized there was a noticeable difference.
Have you ever tried filling the voids with aluminum weld? Such as durafix welding rods. I’ve used these rods to repair minor cracks in engine cases, with good results. I’m curious if these rods would have an advantage over a 2part epoxy when filling these voids.
No I havent. The void are fairly large and putting that much heat could cause warping also you would end up brazing the case hardware to the cases when filling with brazing rods
Great videos I'm subbed ! I have a stock 62t that I want to get some more power out maybe port, big bore,or would I be better getting a 64x cylinders?watever you recommend. How can I get in contact with you ?I would love to send u my motor this winter and have u work your magic on it .
I have engines I built 16 years ago that are still perfect. Most times there is an issue its from heating the cases for powder coat or baking paint. (Which I don't recommend) if prepared correctly you shouldn't have an issue. I haven't had epoxy just fail.
How much does this cost on a average? I have a raider case and 760 cyl. I am just a rec rider but want that zxi power in my blaster. How dependable is this lol
Jeff when ported correctly the are still dependable. PM me on Facebook or Instagram for pricing. Theres a bunch of different options and I recommend a fresh topend after porting so you start off fresh
