Super 2-takt Auspüffe von Roffe Heljefors Uppsala/Schweden
 

Link zum Hersteller dieser Auspüffe:

http://www.vrm.se/
 

Exhaustsystem
With my new computersoftware program,i have a ability to taylormade a exhaustsystem to anykind of twostroke engines from chainsaws to snowmobiles. I can shape anykind of taper and shape with one,two or three stagediffusors or reversecones.When the shape of the exhaustsystem is decided,you print out every section that is shown on the display,put every peice of paper whith a coneprofile on the sheetmetal and cut it out.Then you roll it to a round peice and weld the edges together. I can fabricate a solution from paper to a made exhaustpipe.
	Exhaust drawings A complete build yourself kit in paper to a complete exhaust price from 70 € A complete build yourself kit in paper to a two cylinder engine for example RD 125 or such; price from 120 €
	Build yourself expansionkit x.
	Zündapp expansion chamber A expansionchamber specaly develloped for Zündapp 70 cc. The exhaustkit is avalible in three stages: First stage is a build youre self kit with redy made computeraided drawings that is shown above on this page. Price from 75 € Stage two is a readyrolled kit: with all the details shown on the picture ready to be welded by you . I strongly recomend to weld it with TIG or with a gaswelder with a nossle delivering 25-50 L. MIG welding make the sheetmetal schrink too much and will easyly make the exhaust crack. Price from 216 € Or if you prefer a readymade one by youres truely. The only thing you have to do is weld a mountingbracket and the flange that is delivered with the kit to make the exhaust fit exactly to youre motorcycle. Price 345 from €
	Exhaust to NSR 50 watercooled engine
	Expansion chambers left:HONDA NSR 50 mod RJ1 left bottom:SACHS 50-80 mod KA1 right bottom:HONDA MB/MT 70 mod EK1
Expansionchambers to various engines.
Different parts that can be made; headers, reversecones etc.
	With this sheetmetal roller am I able to roll any shape or angle to every conepart that is needed on a exhaustpipe.
	These pictures shows a damage RS 125 exhaust. The rear end is exposed and not easy to protect when you go down. So what you have to do in this case, is to cut off the damaged part and manufact a new one.
	This picture shows the lack of roundness in a blown factorymade exhaust. That is one of the reasons why roling cones that are welded is so much better.
	This is one of the features you can get if you order a repair of the tailsection.It is a changeable bleederpipe mounting. Very good to have for instance when it's raining, it is possible to attach a smaller bleederpipe for higher backpressure to maintain pipetemperature and better velocity.
	Mounting scene from below.
Gilera exhaustflange to the left, and to the right a Sachs exhaustflange.