Baja 200 update

[Bbqjoe]

Pretty cheap, huh. Shoot! I've been panhandling around the wrong kind of people!

I foolishly overlooked the scruffy-looking dudes on mini bikes. Won't make that mistake again.

I gots me a plan, based solely on your idea.
I hope I make you proud.

 

[Bbqjoe]

Hopefully, all done!

I hope you're pleased Hellion!

Because I am!

I think my friend was a little too 4:20 the other day, and just looking for a fast solution.

 

[chancer]

Dude that is WAAAAAAY!!!! Better.
I did NOT like the other one. never saw a Square exhaust.
This one is cool!

---------- Post added at 05:29 PM ---------- Previous post was at 05:26 PM ----------

Needs a short barrel sticking out the Front.

 

[Hellion]

It's... it's... beautiful!

I hereby dub thee Machine gun Joe!

And seeing our dear friend Abby in repose upon the seat is just perfect.

I've seen a square exhaust. Here. Recently (I wanna say). But it wasn't pretty.

 

[Bbqjoe]

It's... it's... beautiful!


And seeing our dear friend Abby in repose upon the seat is just perfect.

I'm tellin' ya, She really does think the bike is hers!
She sits there and watches all day when I work on it.

I'm very glad you approve!

 

[Bbqjoe]

Some D A asked me elsewhere if I was going to wrap it?

Why would I want to put an ugly bandage on this much work?



Protip: If you ever want to paint your exhaust pipe or any part of your engine, BBQ spray paint is good up to 1200°

 

[Hellion]

I guess he thought his idea was better than yours.

I like the juxtaposition of the two materials--chrome and flat black steel(?). We need more photos because I'm not entirely sure if it's painted!

It can be viewed in two ways too--military style "machine gun" cooling jacket to go with the OD paint or a common perforated exhaust shield as seen on big rigs and cars that have side pipes, etc.

 

[Bbqjoe]

We need more photos because I'm not entirely sure if it's painted!

It can be viewed in two ways too--military style "machine gun" cooling jacket to go with the OD paint or a common perforated exhaust shield as seen on big rigs and cars that have side pipes, etc.

It's painted with what else, BBQ paint.
It's the same stuff the chrome extension is on the exhaust.
It's a thin chrome plated steel.

I decided to paint it because I think it looks better. The chrome was a bit scuffed up, living in the scrap pile and all.
I think I like it thought of it as a MG shroud.

Thanks again for the idea!

 

[Jfive]

Protip: If you ever want to paint your exhaust pipe or any part of your engine, BBQ spray paint is good up to 1200°

Protip: VHT is the only exhaust paint that you should use. I've seen the BBQ paint burn off too many times. Also following the directions on the can really helps. I prefer the ceramic color but they have black too. 2000f

 

[Bbqjoe]

I changed out the 50t rear sprocket with a 60t.
Still goes fast, a hair quicker off the line, and some noticeable hill climbing performance.

Is there anything left to increase snappyness and torque that doesn't involve machining, or fuel?
I still have as yet to polish out the exhaust port.

 

[bob58o]

Easiest?

Switch from 10T to 8T

60 : 10 = 6
60 : 8 = 7.5

((7.5 - 6) / 6) * 100 = 25% Increase in torque.
I think I had to grind the sprocket to make it fit, does that count as machining?


You can switch the spring setting on the TC driven unit. I don't think this will help you much.

Three settings
One is for staying in low gear longer.
One is the middle one.
One is for upshifting faster.

You can switch to a stiffer driven unit spring to stay in low gear longer, but again I don't think this will help much.




---------- Post added at 12:48 PM ---------- Previous post was at 12:46 PM ----------

Besides that smaller tires.

Thinner Head Gasket to increase compression.
9.5:1 with 87 octane.
Need to measure with the head off and use an online calculator.

Keep 0.030" Between the piston top and the head.
So if your piston is 0.020" in the hole, you can use a 0.010" gasket (if with in your octane range).
If your piston sits flush, you can use 0.027" - 0.032" gasket (if within your octane range).

Depending on Piston to valve clearance, they make ratio rocker arms to give your cam more lift (and also duration a bit - I think). More lift = more power at all RPMs.
Keep 0.060" (minimum - "ish") between the valves and the piston.

---------- Post added at 01:09 PM ---------- Previous post was at 12:48 PM ----------


The Sprocket
http://www.bmikarts.com/41-Sprocket-with-58-Bore-B-Type_p_1050.html


This gasket might fit? Says for gx200
http://www.nrracing.com/product-p/12251-zl0-003.htm

1.1 : 1 Ratio rockers
http://www.nrracing.com/product-p/rerockhd.htm
Turn a 0.275" lift cam into a 0.303" lift cam.

 

[minibiker]

^^^^^^^^^^^^^ Good advice

If u don't have a flat top piston that will add more compression. The 1.3 rockers will need stronger springs and new valve train , not worth it imho.

 

[bob58o]

Yep ^^^ also good advice.

I'm not sure if you need new valve train for the 1.1:1 rockers or not. You'd probably need different springs, which means you might.
Ratio Rockers for the hemi 212 are more expensive so I never really looked into them.

 

[minibiker]

If he has the stock rockers they are already 1.1 :1 . The cheap stamped 1.3 rockers break with stronger springs. He would need some good 1.3 rockers, stronger springs, stainless valves, with automotive retainers. The new valves with automotive retainers are a good idea imo. I have lost an engine with 18 lb springs and stock type retainers by revving it high and it dropping a valve.

 

[bob58o]

If he has the stock rockers they are already 1.1 :1 . The cheap stamped 1.3 rockers break with stronger springs. He would need some good 1.3 rockers, stronger springs, stainless valves, with automotive retainers. The new valves with automotive retainers are a good idea imo. I have lost an engine with 18 lb springs and stock type retainers by revving it high and it dropping a valve.

I didn't know the stock rockers were 1.1 : 1.

 

[Poboy kartman]

It's important to match your gear ratio to your lifter ratio...trying to run 1.1:1 rockers on a 1.3:1 drivetrain is a problem.

 

[chancer]

I didn't know the stock rockers were 1.1 : 1.

"Stock Rockers" That is gonna be the name of my new band!

 

[bob58o]

I'll tell you what BBQ-Joe, if that 8T sprocket isn't the best $15 you've spent to improve performance... I'll let you pick my user title for two months.

 

[Bbqjoe]

Gee Bob, as soon as I can get this funding carb finally dialed in, I might consider it.
I'm pretty happy with the 60T I just put on the rear.

 

[bob58o]

OK, your last post made me think you weren't yet satisfied with the torque. Carry on.