Trx250r180
Saw polisher
more info on the strato part
I will try to explain that the best way I can because my 'book' knowledge is pretty low on technical stuff.
Where the design of the 461 differs from other stratified charge engines is that the others use fresh air routed through an additional air valve(butterfly) at the intake.
All that achieved with some additional fancy hardware at the carb end.
Well, the 461 does not use fresh air for the stratification. Instead it uses the exhaust gases for doing the job.Which is why the trasfer ports are begin on the exhaust side of the cylinder, at the bottom end and curve upwards to either sideon the cylinder walls.
The result is a less complicated strato charged engine.
The cut out on the piston skirt does seem to act as an on/off valve for controlling the intake air from the cylinder to the transfer ports.
The carb looks the same as the one on the 460, except for this difference on the outside
This is to reduce the opening of the carb butterfly in the 'Start' position.
Even a slight pressure on the throttle has the engine screaming in the mid ranges.So that additional arm helps the scream at a reasonable level.
The jet sizes are changed. low is richer. High is leaner, for the removable high speed jet.(0.58 in place of the 0.68)
To increase air velocity into the crankcase, for better flushing of the crankcase and for better directional air flow, something called a washbridge has been fitted across both halves of the crankcase, at the inlet side
I will try to explain that the best way I can because my 'book' knowledge is pretty low on technical stuff.
Where the design of the 461 differs from other stratified charge engines is that the others use fresh air routed through an additional air valve(butterfly) at the intake.
All that achieved with some additional fancy hardware at the carb end.
Well, the 461 does not use fresh air for the stratification. Instead it uses the exhaust gases for doing the job.Which is why the trasfer ports are begin on the exhaust side of the cylinder, at the bottom end and curve upwards to either sideon the cylinder walls.
The result is a less complicated strato charged engine.
The cut out on the piston skirt does seem to act as an on/off valve for controlling the intake air from the cylinder to the transfer ports.
The carb looks the same as the one on the 460, except for this difference on the outside
This is to reduce the opening of the carb butterfly in the 'Start' position.
Even a slight pressure on the throttle has the engine screaming in the mid ranges.So that additional arm helps the scream at a reasonable level.
The jet sizes are changed. low is richer. High is leaner, for the removable high speed jet.(0.58 in place of the 0.68)
To increase air velocity into the crankcase, for better flushing of the crankcase and for better directional air flow, something called a washbridge has been fitted across both halves of the crankcase, at the inlet side
