| Author |
Message |
Jaak
| | Posted on Friday, November 01, 2002 - 5:04 pm: | |
The distance of T20 carburettor mounting studs in the cylinders is 48 mm. I'd like to mount 27 mm Mikunis to my T20, but the distance of the mounting holes in these 27 mm Mikunis is 60 mm. How to solve the problem?
|
Spen
| | Posted on Friday, November 01, 2002 - 6:50 pm: | |
I made alloy sleeves up on my bike and mounted the newer, bigger carbs onto these. |
Jaak
| | Posted on Friday, November 01, 2002 - 7:14 pm: | |
What kind of sleeves, could you describe them or send me some drawing? I'm really a greenhorn! How about the heat insulators? |
Adrian
| | Posted on Monday, November 04, 2002 - 9:26 pm: | |
Hi there Jaak
Spen uses a different system to mine and it works fine. My barrels are modified with an Aluminium plate(screwed on with two countersunk bolts) to which I then fitted a carb mounting bracket (£19.00 from Allens Performance).
Here, have a look:
Hope that this helps.
Adrian |
Spen
| | Posted on Tuesday, November 05, 2002 - 9:42 am: | |
Thanks for that Adrian, something else which you should have told Jaak is the fact that all the debris on your engine would not be seen on mine...as I actually clean my bike!!!
My barrels have had the fins cut off and alloy tubes welded on to bring the carbs closer to the piston and the carbs have then been mounted on to a rubber tube. This has shortened the inlet tract and made the bike a lot faster. |
Anon
| | Posted on Tuesday, November 05, 2002 - 4:27 pm: | |
Perhaps your bike doesn't get so dirty at the back of the race......? |
Spen
| | Posted on Tuesday, November 05, 2002 - 6:15 pm: | |
Ouch......... |
malcolm harrison
| | Posted on Wednesday, November 06, 2002 - 8:10 am: | |
Has any body run with filters on as i know of damage caused by dirt in the engine |
Spen
| | Posted on Wednesday, November 06, 2002 - 9:33 am: | |
Funnily enough Malcolm, we were discussing next season's racing and this subject was high on the agenda. It's a worry of mine, having seen the damage a bit of dirt can do. In a 4 stroke it's not such a problem, it goes in and gets thrown back out, but with a 2 stroke it's first port of call is down in the big end area. |
Adrian
| | Posted on Wednesday, November 06, 2002 - 11:22 am: | |
Depends how competitive you want to be. Air has to be forced through a filter and this can use up 3 or 4HP if the filter is efficient. If it ISN'T efficient, whats the point in having it?
Some kind of mesh would prevent big stones flying in, but is that a problem? (Mind you, falling off in gravel could cause some damage!)
I've never seen a racing two-stroke with any kind of filtering - has anyone else?
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Anonymous
| | Posted on Wednesday, November 06, 2002 - 6:39 pm: | |
Yes, a few of my mates in the Early Stocks series run filters for the very same reason as Malcolm mentions. |
Malcolm Harrison
| | Posted on Thursday, November 07, 2002 - 8:30 am: | |
on another point would a filter eventually effect the mixture as a certain amount of blow back accurs from the carbs which could lead to a deposit of fuel not being able to escape and therefore the intake mixture becoming richer as the meeting went on |
Spen
| | Posted on Thursday, November 07, 2002 - 5:35 pm: | |
That's one of the reasons. The blow back contaminates the filter and effectively chokes the motor. |
Advice, help, chat, whatever!