Showing posts with label Expansion chamber. Show all posts
Showing posts with label Expansion chamber. Show all posts

Saturday, October 15, 2011

Yamaha RX series modification

Those of us who used to ride 2 strokes and then had to switch to 4 strokes due to the obvious reason, will always miss them. To sum up my experience with a Bajaj FE scooter and it's maintenance was "No Cam, No chain, No headache!" My dream bike was the shogun, when it was available I did not have the resources to buy it and now I don't have a Shogun to buy, Spares are a major issue.

Even today I see the odd one longingly hoping to own one.

The other bike I wished I owned was a Yamaha Rx series. This series I hope will satisfy my need to have a 2 stroker in my garage. I like to customize almost every thing, either cosmetically or performance or ergonomically. I have been lately collecting pictures of modified Yamaha RX's to get some idea on how I'd like my bike to look.


Over the years I have seen how the mod seen changed. When in my 12th grade, the RX 100 was kitted out with a chrome plated expansion chamber with a belly pan.Some of the expansion chamber were 1 into 1 or 1 into 2, the twin chambers looked very cool. As far as the performance of the chamber is concerned i have no idea as I never rode them. Others also added the "Mag" wheels or Alloy wheels. I've searched quite a bit but been unable to find any pic of this type of mod.



The Rado brand were quite common and also the design in the pic.




In Bangalore the Yamaha's a carriers is welded to the sissy bar added . The belly pan was a lot different than that in the pic, it looked more like that of the RXZ with a radiator cowl.





The sissy bar was chopped off just after the seat and plugged or the sissy bar entirely removed.







On the head light side, a large headlight was added with a grill.
The headlight is lifted in height by using clips.








One more commonm mod was adding a scrambler/off road bike mud gaurd, this gave the bike a bad ass look.





On the seat side, some scrapped off a little foam to make it a little slimmer, In Bangalore adding a Suzuki Samurai seat with a MaX-R 100 tail piece is a common mod.




The sissy bar of the Shogun/Samurai is welded in the place of the original.







The speedometer used on some are of the shogun and some just keep only the speedo and remove the rest.





Using the Yezdi 16inch wheel was and is a very common mod on both Yamaha and Suzuki's , it looks cool also adds good acceleration, at the expense of top speed.



Another mod I have seen in Bangalore is shaving of the fins on the head. It looks nice, and I have no information on the effect of cooling efficiency.











On the handle bars side, we used to use the Fury handle aka short handle, this was quite common and still it. Some use the shogun or the RD wide handle.

A fury Handle, No idea why it was called a fury handle.








Some neatly modded pics off the net.


Monday, December 20, 2010

Books for Automotive Performance enthusiasts

Motorcycle Handling and Chassis Design





The motorcycle is a complex system that has long defied full analysis. For a very long time, motorcycle handing was hardly even considered a subject. Engines, whose performance could be measured in "objective" terms, therefore received the lion's share of development. Engine development moved rapidly ahead of chassis, suspension, and tires, creating a succession of design crises that required new thought for their solution. Examples might be Rex McCandless's twin-loop swingarm chassis of 1950, Tony Mills's wide, belted Dunlop Daytona tire of 1974, and the present-day elaborations of Antonio Cobas's large-section aluminium twin-beam chassis of the early 1980s. In each case, motorcycle performance had ceased to advance because of
specific problems that could not be solved by traditional means.
The book “Mototorcycle Chassis Design” was first published in 1984 and was subsequently reprinted several times without under-going change. Although out of print for over 12 years or so, I know from personal inquiries that there is still considerable demand for a book on this subject. A new book was obviously well overdue, although much of the original material is as current today as it always has been. After all, the laws of Newtonian Physics tend to be stable over time.
Contents
1 Function and history
2 Tyres
3 Geometric considerations
4 Balance and steering
5 Aerodynamics
6 Suspension principles
7 Front suspension
7 Front suspension
9 Squat and dive
10 Structural considerations
11 Engine Mounting
12 Braking
13 Materials and properties
14 Stability & control
15 Performance measurement
16 Practical frame building
17 Case study
18 Future developments


Two stroke tuner handbook by Gordon Jennings






One of the most famous books on 2 stroke tuning. Detailing for any one interested in increasing the performance of their machines. A bible for building a High speed and high power 2 stroke machines.
With chapters giving insights on the following topics
contents
Fundamentals
1.predicting power
piston speed
piston acceleration
2.Crank Train
3.Cylinder heads
4.Expansion chambers
5.Port timing
6.Crank case pumping
7.Cylinder scavenging
8.Carburetion
9.Ignition

Performance tuning by A Grahmbell



Bell covers all areas of engine operation, from air and fuel, through carburation, ignition, cylinders, camshafts and valves, exhaust systems and drive trains, to cooling and lubrication. Filled with new material on electronic fuel injection and computerised engine management systems. Every aspect of an engines operation is explained and analyzed.


This torrent includes both the books of the renowned author.




Undoubtedly, the virtue which has most contributed to the widespread use and varied application of the two-stroke engine is its mechanical simplicity. Tuning expert A. Graham Bell takes readers through the various modifications that can be made to a two-stroke and its components in order to derive maximum usable power and mechanical reliability. Both the latest advances in two-stroke tuning and old standbys are covered for all areas of operation, from ignition, carburetion, cylinders, and valves through exhaust systems and dyno tuning. Updates to this expanded edition include new photography, line diagrams and explanatory charts.