Suzuki GT250 Racer Pt. 8 | DIY 2-Stroke Porting with Garage Tools (Race Engine Build)

Description
In this video I go through the first version of the cylinder porting on my 1973 Suzuki GT250 2-stroke race bike.
I start by making a port map from the stock cylinder, then analyze it with my own DIY software, re-design the porting to satisfy STA target numbers, prepare port map template, and finally do the actual porting work.

Stage 1 porting is kept relatively mild — I want to proceed in small steps and compare performance gains along the way. Still, the bike ran surprisingly well, even against water-cooled Yamahas, before things went wrong…


📌 Chapters
0:05 Intro
0:29 Info
0:48 Making Port Map from Stock Cylinder
2:24 Port Map Analysis with DIY Software
5:04 Porting Template Preparation
6:15 Attaching the Port Map Template to Cylinder
7:36 Porting
11:40 Making the mistake
12:16 Cylinder Port Cleanup
13:07 Stage I Performance
13:57 Analysis: This is what went wrong
17:15 Stage II Porting plan
17:37 Next time: Cylinder heads

🔧 If you need anything made from laser-cut steel or aluminium, or even help with the design, feel free to contact me at eacmcrc@gmail.com

Tags

Suzuki GT250, 2-stroke porting, two stroke tuning, cylinder porting, port map, STA calculation, DIY engine tuning, vintage racing motorcycle, classic road racing, piston port engine, Suzuki T250, Suzuki GT, Gordon Blair 2-stroke, Frits Overmars formula, motorcycle restoration, DIY porting, race engine build, premix lubrication, 2 stroke performance, motorcycle porting tutorial

Hashtags

#2Stroke #SuzukiGT250 #ClassicRacing #MotorcyclePorting


🎵 Music

Nathan Moore – The Dance Before
(YouTube Audio Library, free to use – no attribution required)

Kevin MacLeod – Manic Polka
Licensed under Creative Commons Attribution 4.0
https://creativecommons.org/licenses/...

Source: http://incompetech.com/music/royalty-...

Artist: http://incompetech.com/