This is my Hot rod the day I put it away last fall. There is a build thread on the old forum, I have no intentions of doing another. But heres a little update. No major changes planned except for new carbs, I went from 34mm straight bore lectrons to 38mm High velocity lectrons. (See pic) The idea is that they will still work like 34s down low but should let it breath better up high like big carbs do. No other changes except for a top end freshen up with new OEM Yamaha TZ750 pistons, wiseco rings, and new wrist pins and bearings. The reason for new pistons already is because when I built the motor it was suggested to start with used pistons so that's what I did.
those carbs! :swoon:
Bring it on Joe, glad to see its progressing.
Can't wait to see it in action.
I like that style. Simple lines and nothing to much on it :clap:
Quote from: stresa on February 14, 2019, 12:04:28 PM
I like that style. Simple lines and nothing to much on it :clap:
I'll second that, really tidy looking.
Those carbs look savage.
So the used Pistons help eliminate what?
Quote from: Greaser Greg on February 27, 2019, 01:07:58 PM
So the used Pistons help eliminate what?
I suppose if there are any problems during break in you would be ruining used pistons instead of rare and expensive hard to find new OEM pistons that are no longer available. However there are a couple of aftermarket companies that make them now but only in small batches from what I understand.
The new carbs are on and the bike runs ok. It was way too rich the way Lectron had the carbs set up initially so I put in the other metering rods that they supplied at the setting they suggested and it was better but still too rich for my liking. I have a third set of rods that I installed and it is closer my liking.
The metering rods are for idle up to about half throttle, from that point the power jet takes over. The adjustment on the rods affects the idle mixture the most and has less effect on anything else. There is a sweet spot for every set of rods that gives you the best mixture at idle and I don't know where that is on the set of rods I'm using right now. Lectron has a "fuel ratio" tool that is used for setting these up for the perfect idle mixture. I have that tool on order so I can get these set up properly and hopefully get the perfect idle mixture. So far the initial feeling with these rods even at the potential wrong setting is pretty impressive. I can't wait to get them dialed in the way they should be.
I was doing some work on the TZ the other day and since the lighting was just about perfect for pictures I decided to take a few and share them with you guys.
A few more.
Well done. Looking good! :nana:
That is a fantastic motorcycle. :righteous:
That is one sweet machine. :clap: :clap:
Here's a few from the rear
One of the coolest builds
Definitely a sweet bike. :clap: :clap: :clap: Any videos of it running?
Quote from: nojoke2stroke on July 31, 2019, 01:45:54 PM
Definitely a sweet bike. :clap: :clap: :clap: Any videos of it running?
No vids of it running.
Quote from: nojoke2stroke on July 31, 2019, 01:45:54 PM
Definitely a sweet bike. :clap: :clap: :clap: Any videos of it running?
I'll take one and post it to youtube or something this weekend. Meanwhile, heres a short one on my Instagram account from when he first got it together a couple years ago shortly before Barber.
https://www.instagram.com/p/BZn7P6oALaE/?igshid=1ily5cvv9pwum
Wow! Turned out great Joe!
Love the clear bowls.
Hi all, very very nice build ,love the dash,what rear shocks are those Joe ?
it looks even better in person...
Quote from: preben54 on January 16, 2020, 09:25:58 AM
Hi all, very very nice build ,love the dash,what rear shocks are those Joe ?
Thanks...........rear shocks are YSS.
Quote from: JB Weld on January 11, 2020, 11:10:50 PM
Wow! Turned out great Joe!
Thanks Josh......................not sure if you remember or not, but the parts bike I bought from you 4-5 years ago? Well, this is what that project turned into. The original plan was to use that frame, etc. to build what you see, but one thing led to another and long story short, the only part of that bike that was used on this in the end is the title. Everything else was replaced in one way or another, including the frame.
A really nice bike there Joe! Nice looking pipes too! I understand you are running TZ750 cylinders and pistons. No sign of any issues because of the short inlet side piston skirt?
I understand the TZ750 crank turns the opposite direction, making the exhaust side take the thrust loads, instead of the inlet side as on the RD and TZ 250/350.
I can't anwser for Joe but on our race bikes, eventually the pistons have a perfect intake port map from slapping the inlet side hard. That was with 1X2 pistons in a 409-70 set of barrels.
Quote from: Dvsrd on April 03, 2020, 11:27:54 PM
A really nice bike there Joe! Nice looking pipes too! I understand you are running TZ750 cylinders and pistons. No sign of any issues because of the short inlet side piston skirt?
I understand the TZ750 crank turns the opposite direction, making the exhaust side take the thrust loads, instead of the inlet side as on the RD and TZ 250/350.
Haven't had any problems yet. I'll dig out the old pistons I took out and take a look at them again and report back but I don't remember seeing anything too noticeable.
Curious. How is it getting Lectrons to run on a 2 stroke twin? They don't have much info on that online but it seems like they want us to believe it is child's play on a dirt bike 1 banger.
IR8D8R
Quote from: IR8D8R on April 05, 2020, 12:12:24 AM
Curious. How is it getting Lectrons to run on a 2 stroke twin? They don't have much info on that online but it seems like they want us to believe it is child's play on a dirt bike 1 banger.
IR8D8R
If you buy the carbs from them they have them set up already. In my case they were way off. Lectron insisted I have other problems and that it can't be the carbs. They wouldn't sell me the metering rods I thought I needed because they said there's no way it will run on those and there's no reason it shouldn't run the way they had them set up. I finally was aebe to get what I wanted thru Sandtrax. Dealing with Lectron was the worst part about trying to get them to work right. Now that I have the metering rods I wanted, it runs awesome. They are really pretty simple to tune.