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I'm looking for 1 person to tutor doing their own Stage 1 cylinders in their own garage with their own tools. I'll take you through step by step at your pace up to 3 months. Most Q&A must be by phone, I'm not going to be a pen pal. I'll supply some written instructions, diagrams, print outs, examples etc. We will cover modifying the intake ports, reed valves, liners at transfer entry, transfer ducts, transfer windows, boost ports, exhaust ports, pistons, squish clearance and angles, head cc's, compression, timing etc. If you intend to modify the heads, you will most likely need an outside machining source.
Selection of who I help will be made after discussing your project. Message me through the forum.
My input and time are free but you will need to donate $25.00 or more to support the forum before we start.

Yamaha Enduro Singles, If you have an air cooled single, any size, that you would rather do, I'm open to discussing it.
John Ritter

 

Noticed separate listings by same seller for a left and right 2R8 cylinders. Good starting point for performance mods, each cylinder $99.99.

Just noticed Treatland has HPI's in stock for RD's

S2 Kawi triple pipes. If anyone is interested, triplesstuff.net has a set of PRO-FLO pipe listed. They are a good street pipes with or w/o porting. I know, I was there 

Will a 1972/3 LT2 100cc engine bolt into a RD60 frame without modifying the frame. I have a 1980 GT80 engine that I am going to bolt in because its a bolt swap but was just offered a LT2 engine but do not know if it is a direct swap, I'm of the opinion it isn't. I do not want to molest the frame because it has a matching numbers newly rebuilt engine and the entire bike only has 900+ miles on it plus we've had it maybe 20 years or more. I have 1974/5 MX100 engines and they will not bolt in but I think the bottom end cases of the LT2 is an older design. Thanks in advance.

Guys, I am closing the business. I appreciate having been able to do work for and be part of the RD street and race crowd for decades. Met more friends through the business than I could ever count and am eternally grateful for that. I just had a couple heart surgeries and have been told to take it easy for the next couple months making this a good jumping off point. As some of you know that have been to the shop, I have a couple projects that have been ignored and neglected so now I'll dedicate a bit of time to them as I can.

Thank all of you very much,
John Ritter

 Vintage Porting  Is no longer in business due to health issues. Thank you, John Ritter

Labor starts @ $175.00.  DS7, R5, RD250, RD350 & RD400
John Ritter
Ph. 931-374-8164

[H0388020C]

Years ago I had Cometic make me copper RD400 head gaskets in various thicknesses that have a 66mm bore. The most common used number is for .020" thickness. This part number is    H0388020C   , if you need a different thickness check their online chart for copper thickness and replace the 020 in the number, for example  027 , order part number  H0388027C  etc.

Stock ports. Will need a fresh bore $75.00

Dale Walksler lost his 4 year battle with cancer yesterday.  The museum in Maggie Valley, founded by him is a treasure trove of history. Something to add to your bucket list if you have not seen it yet. I've been there twice and will visit again.

In about a month or less a rubber coated YZ85 V4 reed will be out that will give longer petal life, good for the street guys. One large petal instead of 2. Other improvements too. Good for up to 34mm carbs. --- You listening Inov8 ????

 This is for RD's, R-5 & DS-7.

2023 prices now available. Call or email for updated prices. Ph 931-374-8164  Email  vintageporting@gmail.com

January 1 Will begin porting and engine work on a limited basis. I am working on pricing for stage 1 and 2. It's unlikely I will do extreme builds for the public but am always willing to share what knowledge I have.

Reason for reopening - Friend that works for the city stopped by end of last week and told me there is talk of annexing my part of the county which will bring zoning, presently our county has no zoning, January 4th I will get a new business license and reinstall my signage on the building.

All new and returning customers are welcome.

Mark, thank you for the space,
John Ritter

I am willing to help/teach/instruct for 3 days in June or July if someone is interested in coming to my shop to port their DS7 or R5 cylinders to Stage 1, hot street, and deck the heads for 92/93 octane. Only a few requirements which are you must commit to the 3 full days (8 to 5), must be able to stand for long periods and the cylinders and heads must be media blasted before your arrival. The cleanliness is mandatory or you just wasted a trip and deprived someone else of being here. I have all the porting tools and machinery required. I'm retired and have been doing this to give back a bit to the 2 stroke community. You will need to find a motel or campground for your lodging and be prepared to go for fast food lunches, I am not going to charge for the 3 days (use that savings to clean the parts). Bring your top end only, do not bring the bike, we are not building a running bike, only doing the porting and heads. I suggest you plan on having a fresh bore job after you get home, we will not be boring the cylinders here. Eye protection is mandatory and no alcohol or drugs during shop time. Yes, I've had both happen with different people that's why I mentioned it.

If you have another bike, 2 stroke or 4 stroke, and want to enjoy some of the back roads here then bring it along and we can take an evening ride. Lots of turns to play with in this area.

Message me through the board if interested. I should be able to answer most questions.

I just learned of this article, thought I would share in case it is new to someone else also.

https://www.motorsportmagazine.com/news/f1/two-stroke-engines-eco-fuel-f1-aims-be-greener-formula-e

One for street and one to turbo for land speed. https://www.youtube.com/watch?v=bVYAQl5E09Q

[UPDATE....]

UPDATE....
We did 3 top ends, all took 2 days. 1st was a board members R5, 2nd was a RD400 minus reed valve mods or we would have been to the 3rd day and screwed up the scheduled day of riding and 3rd was a 1975 DT250. Both the RD guy and DT guy race motocross with Yamaha engines I've been doing for years for them and know each other well. We scheduled a ride day with one guy staying the 3rd day and the other guy came in a day early. So the local back roads had my RD250, a CT3 and a basket case RD350 enjoying the day.
Sometime after the start of 2020 I might do it again if there is any interest. I'll post here if I do it again.


THIS APPLIES TO STOCK RD CYLINDERS/HEADS/REED CAGES
If parts have been previously modified we won't be able to use them, any doubts you can email me pics so your trip is not wasted.

Okay, retirement is a great thing unless you miss doing what you love. So, at no charge to you I will direct you as you Blueprint your own top end in my shop. I have the proper porting and machining equipment and more. Past experience has shown that it ends up taking guys 2 days (it is a 2.5 to 3 hour job typically). There are motels, campgrounds and lots of food places close by.

This is not a Stage 1 port job, this is a Clean & Match, most often referred to as blueprinting. We will discuss a lot of porting info and show you some basic computer programs, show you how to layout the ports etc.  Your completed job will have a performance bump and in some cases end as strong as some shops Stage 1.

Your CLEAN parts are all we need, bring your Top Case if you want. Do not bring the bike you are working on, just the parts. BUT if you have another RD or 2 stroker that is street legal we can catch a couple of the local roads after work. You will be standing most of the time, not sitting very much.

IF YOU SHOW UP WITH DIRTY PARTS YOU WILL SIT AND WATCH ME CLEAN PARTS AT $85.00 AN HOUR PLUS MATERIALS AND WHEN CLEANING PARTS I AM THE SLOWEST S.O.B. YOU EVER LAID EYES ON --- GET THE POINT???. NO DIRTY PARTS OR BRING A FAT WALLET.

If you think this is something that interests you send me a message with your phone number, I hate typing so questions by phone only please. John Ritter
Lawrenceburg, TN 38464

Has anyone attempted to install a Recluse clutch or similar style on an RD? If so what bike was it designed for before you adapted it. I have a lockup but would like to consider something different. Thanks.