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Flat spot before the powerband.

Started by quocle603, September 04, 2020, 10:47:22 PM

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quocle603

**Update**

I was able to test ride the bike without the Y Boot with the single K&N filter. It definitely helped my throttle response with the extra amount of airflow. The flat spot is much better but I will mess around with my needle positioning to see if it improves anything.
Do not underestimate the power of a two-stroke.

1975 Yamaha RD350 (modified), 1973 Yamaha RD350 (stock), 1971 Suzuki T500, 1981 Yamaha XS650 HS2, 1982 Honda MB5, 1980 Puch Maxi, 1979 Puch Magnum, 1993 Tomos Bullet, 2003 Malaguti Firefox F15 LC

quocle603

**Update**

Changed the needle position to position one and it helped it a bit more with the throttle response but it's still a little rough between that 5-6k gap. I will see what I can do with the transition to my mid range.
Do not underestimate the power of a two-stroke.

1975 Yamaha RD350 (modified), 1973 Yamaha RD350 (stock), 1971 Suzuki T500, 1981 Yamaha XS650 HS2, 1982 Honda MB5, 1980 Puch Maxi, 1979 Puch Magnum, 1993 Tomos Bullet, 2003 Malaguti Firefox F15 LC

m in sc

this is where reed spacers may help a bit.

quocle603

Thanks for the tip, Mark. I will look into this. Be cool if I can use some high temp filament and 3D print some.
Do not underestimate the power of a two-stroke.

1975 Yamaha RD350 (modified), 1973 Yamaha RD350 (stock), 1971 Suzuki T500, 1981 Yamaha XS650 HS2, 1982 Honda MB5, 1980 Puch Maxi, 1979 Puch Magnum, 1993 Tomos Bullet, 2003 Malaguti Firefox F15 LC

m in sc

that, unfortunately,  would be a negative.  1/4" aluminum plate or the ones john sells at economy.  :twocents:

quocle603

I was gonna ask my buddy to cut me some with his plasma table, I saw that John was selling 9mm ones but 1/4" (6mm) would would as well?

I was just pulling your leg about the 3D printed parts, still going to try to make those expansion chambers though!  :dawg: :dawg:
Do not underestimate the power of a two-stroke.

1975 Yamaha RD350 (modified), 1973 Yamaha RD350 (stock), 1971 Suzuki T500, 1981 Yamaha XS650 HS2, 1982 Honda MB5, 1980 Puch Maxi, 1979 Puch Magnum, 1993 Tomos Bullet, 2003 Malaguti Firefox F15 LC

m in sc


quocle603

Just got some 1/4 inch steel spacers made by my buddy. Simple 2 min cuts from his plasma CNC machine. I will be putting them on my RD tonight.
Do not underestimate the power of a two-stroke.

1975 Yamaha RD350 (modified), 1973 Yamaha RD350 (stock), 1971 Suzuki T500, 1981 Yamaha XS650 HS2, 1982 Honda MB5, 1980 Puch Maxi, 1979 Puch Magnum, 1993 Tomos Bullet, 2003 Malaguti Firefox F15 LC

smokah

Any update with the spacers installed?

quocle603

Sorry, Dino. No major updates. I have been working on my Suzuki T-500.

It seems like it has helped it a bit, but I would need to rejet my carbs. I think I over shot my pilot jet (i went up two steps) when I installed the spacer. Riding season is almost over, so I would need to jump on this.
Do not underestimate the power of a two-stroke.

1975 Yamaha RD350 (modified), 1973 Yamaha RD350 (stock), 1971 Suzuki T500, 1981 Yamaha XS650 HS2, 1982 Honda MB5, 1980 Puch Maxi, 1979 Puch Magnum, 1993 Tomos Bullet, 2003 Malaguti Firefox F15 LC