Mrs. 2LZ TT250. Into the Fire....
 

....and out like the Phoenix.

Hi gang, Just wanted to give you all a heads up on the latest project. After our morning ride today, the TT250 will be going on the rack for the tear down. I have about half the parts here now and the rest should be arriving sometime next week (hopefully).

For those who wish to follow along, the project will consist of the following, but I'm sure will change as it goes along.

Motor, starting from intake: New K&N style breather, Mikuni carb with a mix of jetting, post-break-in valve adjustment, swap to iridium plug, new exhaust (wrapped), switch to synthetic oil. Re-torque every motor mount.

The rest: Go through the forks, new fluid. They've been working sub-par to date, are still slightly twisted in the trees (binding) and they seem over-filled on fluid (just guessing). Drop off rear end including swing arm and shock. Grease everything as it should be, including link and readjust the shock. I currently went overboard on softening it for Mrs. 2LZ. Replace the stock horrible chain with a new one. The stocker, regardless of lube, insists on kinking in spots. Unacceptable. Replace the stock 50 tooth rear sprocket with a 47 from JT Sprockets. I'll be gambling on a JTR269.47. Also, on top of the already added cockpit bling, I'll be mounting some 30mm Tusk risers, per Mrs. 2LZ request. If I forgot anything, I'll add it later. In addition, if the new gauge cluster from "mjstef" comes through, that will be part of the project while I have it down. Also, I have two new Kenda Tuff Tubes in stock....but I may not change out the original China Condoms until they blow. We'll see. So far, they're holding and I may just wait till I swap to the Shinko 705's...but surprisingly, we're really liking these stock tires so far for our riding habits.

Schmise: Safely remove and store everything smog related. Make a plate and block off the hole in the head for the pump. Finally, weigh everything between old and new to see overall fat savings. I'm hoping to gain a 3-4 HP (per butt dyno) and lose up to 10 or so pounds. Just guessing at this point.

Anyway, stay tuned if you wish.... Many pics to follow.

Are you sure you want Shinko 705's? I think they are the absolute worst tires on the planet.

Good luck on your weight loss;)

This is going to be great.

Just wish had actual stock basis dyno :shrug: course which would you rather do spend money on dyno test or on actual Mc parts, I think we know the answer. :hi:

[QUOTE=BlackBike;225161]

This is going to be great.

DITTO ! :tup:

I think 2LZ was a Dokken fan back in the 1980s.

Nah..... I was more Hendrix, Zeppelin, Cream, Airplane, Alice Cooper.....

Strange. They rate well and supposedly better than my Kenda's that I like on Q. We'll see....... The stockers sure seem to be surprisingly good for a stock tire regarding paved twisties and dry gravel roads.....

Headway
 

I got up early this morning, posted the thread and then headed out to the garage to get everything ready. Cleared a shelf and a bunch of bins. ready to play!

Got back from our morning putt around 11:30. Got the TT on the rack around noon and went at it. Being a NASCAR fan, it was a tough job thanks to Loudon NH. Mrs. 2LZ would yell from the house, "Yellow! 18 out front!"...and I'd have to run in and see the restart. Needless to say, it was "Wrenchus Interuptus" quite a few times today....but I persevered. The bike had 13+ hours on the clock since I installed the tach unit so it's ready to go!

There were quite a few things I discovered today. First, I'll need to get a hunk of black plastic and fab an inner rear fender if I want one. The back of the air box plays that roll and it's now in the pile. No big deal.

Secondly, as expected there is very little grease on the swing arm pivot, axles or shock links. Also, I think with the scads of these CSC got in and needed to ship, it was pretty obvious that the valve cover had not been off. I think they give them the "does it rattle?" test and if so, send. Can't blame them really. The bike ran really well.

I took off all the smog, blocked the vac port on the intake manifold the old fashioned way (which I may replace) and fabbed the plate for the smog pump hole at the head so it's ready to go. Carb, exhaust, etc....all in a pile now. Need parts.

I was VERY impressed with the machining. I thought the rocker assembly was nicely done on my Lifan motor, this was impressive. Nicely done by Zong.

I got those ugly, scratched up bars shot today in the closest thing I could find to the dark, dark gray that's on the plastic's The pic doesn't show it but it's a very close match. Good enough.

Anyway, the bike's down, on TDC and ready for the valve set tomorrow after work when it's ice cold. I think that's about it for now.........

Continued
 

More pics...

I here ya,(worn out cassettes of dokken,scorpions etc) back up a couple of generations for 2lz.

What is the perceived benefit to installing a Mikuni carb as opposed to simply re-jetting the stock carb? Are the venturis different sizes?

So there were still some gap on the "air valves" as the owner's manual calls them?

Thanks for taking the time and posting all this stuff :tup:

Also, could you show a pic of how to grease the swing arm when you get around to it.(other than just greasing the bolt, is there actual bearings?)

Thanks

i am sure you thought of this already, but you may want to put the new parts on the scale before you install, for a true number of reduction of lbs

Yep... I'm just waiting for the carb and breather to arrive for this. I have a bucket on a scale and I'll tare the bucket weight prior to weighing for comparison. See if it's worth it for anyone else to try.

The swingarm is just bushed. There was some grease on them but I'll be coating the entire pivot bolt with a glaze of grease just for the corrosion aspect, along with regreasing the bushings. I've had swingarm bolts rust in place. Not cool.

I'll be posting what gaps I find in the "air valves" after tonight. They did tick so that's good.