1989 Blaster Engine Rebuild - Part 7

Part 1 - Part 2 - Part 3 - Part 4 - Part 5 - Part 6 - Part 7 - Part 8 - Part 9 - Part 10 - Part 11 - Part 12 - Part 13 - Part 14






More Preparation


Two-Stroke Software Review

Part 1

More Preparation

There's a few more things to measure and the ports need to be indexed. I started by outlining the ports with permanent marker then I lightly scribed vertical lines at the exhaust port edge using a small T-square. The horizontal lines are scribed using the piston as a guide.


The port tops have been colored with red permanent marker. It will work well enough for this job. You can see the vertical and horizontal scribe lines I outlined the exhaust port with - there's one at the top of the transfer port too.


The cylinder head needs to have its volume measured against a flat Plexiglas plate so it can more easily be recut to the proper specification. The clear plastic plate is sealed with a little grease. It holds 22 cc's this way. That's a real spark plug in the hole.


What looks like a small scratch is a light scribe line on the piston. I put them there when the barrel was on the block and the piston was at BDC. The line(s) indicate the upper edge of the intake port(s). If I need to I can make the port larger (cut it higher). I don't want the lower ring to fall into the port.


The small, fine, tool & pocket knife sharpening stones are good for removing little pieces of gasket material - they're flat and straight. When held firmly it will remove stubborn gaskets and it won't leave any gouges. I use these to avoid the scrapes that razor blades and other sharp tools leave behind.

1989 Blaster Engine Rebuild - Part 7

Part 1 - Part 2 - Part 3 - Part 4 - Part 5 - Part 6 - Part 7 - Part 8 - Part 9 - Part 10 - Part 11 - Part 12 - Part 13 - Part 14

More Preparation







Two-Stroke Software Review

Part 1

MacDizzy Home | Blog Page | MacDizzy M.U.L.E. Engine Builds | MacDizzy Update 2011! | MacDizzy's Two Stroke Technology Exchange | MacDizzy Tee Shirts | Compression Ratio Chart | YFS200/DT200 Yummie Yami | YFSYZ Hybrid | Two Stroke Engines | TRX Specs | TRX Dyno | TRX 270cc Engine | TRX Intake & Shifter | Two-Stroke Software Review | Blaster Rebuild | 2 Stroke Cylinder Mapping | Basic Porting | Banshee 370 cc Long Rod | Engine Building Formulas | LT250R Melt Down | RZ500 - Old Friend | TRX Internal Discoveries | More TRX Internal Discoveries | Little L Tease | GP760 Observations | KTM


MacDizzy's Two Stroke Technology Exchange is the Two Stroke Engine Capital of the Internet.


Date Last Modified: 11/29/2012
Mystery Achievements, Ink™© 1991-1999 - MacDizzy© 1993-1999

Copyright 2010, 2011