Preparing my old Yezdi for the Delhi Speedrun

cinclaturbo · 4th March 2006, 12:37

bridge the exhaust ports and run one chamber.

cbr1000f · 4th March 2006, 17:16

First step would be to get rid of the rims and the tyres.
The Yezdi 16' wheels are way to heavy.
best would be to shift to 17'

You would need a better/bigger carb.
say something like a 28mm or a 32mm.

You need to loose all the weight you can on the bike to make it competitive.your going to be competing against the 350 twins!

Try and find someone in delhi experienced enough to make you a good expansion chamber.its the most crucial part of a two stroke engine.

ALL this apart from a good port job is all you would need to manage a good timing.

best of luck with the project.

janeckozzy · 5th March 2006, 15:51

hey abishek..i have a 83' yezdi classic.. got a lot o work done on it ground up.. bluepeinting of the engine to porting, boring out,etc you need lots of work to make the classic a good drag bike.. this is primarily due to the design of the engine.. long stroke, not very hi rpms.. can be done but you need someone who has played with yezdis.. a roadking will make a better candidate. as for the chambers you will need to sit down with design formulae and work out for yourself at what range you want them to function and desgn them accordingly..

abhishek_nath · 6th March 2006, 00:00

Thanks guys,

Now after looking at all of you post I think that i should restore my Yezdi to stock and original like new with just a better air filter and a bigger carb if allowed on stock race 250cc. And for mod categories drags race i will start off with a new project over good RD350 but not this year. So this year i will be there either with my restored yezdi if i am able to finish it before the speed run or I will be their with my car (stock alto) to cheer you all guys from team BHP.

Regards

Abhishek

satyamenon · 9th March 2006, 12:30

Quote:

Originally Posted by cinclaturbo

bridge the exhaust ports and run one chamber.

I thought the Yezdi's had one bridged exhaust port already? Are you trying to say he should make it a single large exhaust port?

cbr1000f · 9th March 2006, 15:45

Quote:

Originally Posted by satyamenon

I thought the Yezdi's had one bridged exhaust port already? Are you trying to say he should make it a single large exhaust port?

satya,
so your saying the yezdis have 3 exhaust ports from which two are bridged? and one unabridged ?

satyamenon · 10th March 2006, 11:25

No. The yezdi has one ehaust port which is bridged. Period.

2L8uLoose · 10th March 2006, 11:35

Is the Delhi Run on?? Not heard anything about it but I have heard that the Bangalore Run is on for the First week of April.

janeckozzy · 12th March 2006, 14:59

@satya.. the roadie has one x port that is bridged.. the classic has two seperate x ports

satyamenon · 12th March 2006, 22:39

Quote:

Originally Posted by janeckozzy

@satya.. the roadie has one x port that is bridged.. the classic has two seperate x ports

Oh. Didn't know that one... interesting. And yet, the roadkings were supposed to pump out more power than the classics...

janeckozzy · 29th March 2006, 14:37

the roadies do pump out more power.. 2 bhp more approx.. mapnly due to eng. design.. classi more of a long stroke design.. roadies shorter.. revs sweeter and higher

Tom · 29th March 2006, 15:55

as far as i know there isnt a 250cc category.....LOL :

S@~+#0$# · 29th March 2006, 16:44

To improve performacen, try and hunt for a High-compression head (popular with yezdi mechanics as "flower" because of its shape) for your yezdi. It used to come standard with one of the yezdi models not sure which. Also with regards to to expansion chamber, don't try 2 yamaha expansion chambers, there is a lot of calculation that goes into the design of an expansion chamber.... just try talking to other yezdi mechanics, you'll be able to source them.

Good Luck with preparation of your drag yezdi bike. All the best for the drag as well.

cbr1000f · 29th March 2006, 16:58

Either ways the DElhi Speedrun has been cancelled.
Hard LUck mate.

Get to know Yezdi mechanics in your city and slowly build it up.

satyamenon · 31st March 2006, 00:14

Quote:

Originally Posted by janeckozzy

the roadies do pump out more power.. 2 bhp more approx.. mapnly due to eng. design.. classi more of a long stroke design.. roadies shorter.. revs sweeter and higher

Oh yeah. forgot about the shorter stroke. You're right. that definitely lets the bike rev more.

4th March 2006, 12:37	#16
cinclaturbo BHPian Join Date: Jan 2005 Location: Bangalore Posts: 185 Thanked: 76 Times View My Garage	bridge the exhaust ports and run one chamber.
	() Thanks

4th March 2006, 17:16	#17
cbr1000f BHPian Join Date: Sep 2005 Location: Mumbai. Posts: 148 Thanked: Once View My Garage	First step would be to get rid of the rims and the tyres. The Yezdi 16' wheels are way to heavy. best would be to shift to 17' You would need a better/bigger carb. say something like a 28mm or a 32mm. You need to loose all the weight you can on the bike to make it competitive.your going to be competing against the 350 twins! Try and find someone in delhi experienced enough to make you a good expansion chamber.its the most crucial part of a two stroke engine. ALL this apart from a good port job is all you would need to manage a good timing. best of luck with the project.
	() Thanks

5th March 2006, 15:51	#18
janeckozzy BANNED Join Date: Mar 2006 Location: mumbai Posts: 57 Thanked: 0 Times	hey abishek..i have a 83' yezdi classic.. got a lot o work done on it ground up.. bluepeinting of the engine to porting, boring out,etc you need lots of work to make the classic a good drag bike.. this is primarily due to the design of the engine.. long stroke, not very hi rpms.. can be done but you need someone who has played with yezdis.. a roadking will make a better candidate. as for the chambers you will need to sit down with design formulae and work out for yourself at what range you want them to function and desgn them accordingly..
	() Thanks

6th March 2006, 00:00	#19
abhishek_nath Newbie Join Date: Feb 2006 Location: Delhi Posts: 11 Thanked: Once	Thanks guys, Now after looking at all of you post I think that i should restore my Yezdi to stock and original like new with just a better air filter and a bigger carb if allowed on stock race 250cc. And for mod categories drags race i will start off with a new project over good RD350 but not this year. So this year i will be there either with my restored yezdi if i am able to finish it before the speed run or I will be their with my car (stock alto) to cheer you all guys from team BHP. Regards Abhishek
	() Thanks

10th March 2006, 11:25	#22
satyamenon BHPian Join Date: Dec 2005 Location: Jacksonville, FL Posts: 109 Thanked: 5 Times	No. The yezdi has one ehaust port which is bridged. Period.
	() Thanks

10th March 2006, 11:35	#23
2L8uLoose BANNED Join Date: Feb 2005 Location: Bombay Posts: 627 Thanked: 9 Times View My Garage	Is the Delhi Run on?? Not heard anything about it but I have heard that the Bangalore Run is on for the First week of April.
	() Thanks

12th March 2006, 14:59	#24
janeckozzy BANNED Join Date: Mar 2006 Location: mumbai Posts: 57 Thanked: 0 Times	@satya.. the roadie has one x port that is bridged.. the classic has two seperate x ports
	() Thanks

29th March 2006, 14:37	#26
janeckozzy BANNED Join Date: Mar 2006 Location: mumbai Posts: 57 Thanked: 0 Times	the roadies do pump out more power.. 2 bhp more approx.. mapnly due to eng. design.. classi more of a long stroke design.. roadies shorter.. revs sweeter and higher
	() Thanks

29th March 2006, 15:55	#27
Tom BHPian Join Date: May 2004 Location: Bangalore, India. Posts: 401 Thanked: 0 Times	as far as i know there isnt a 250cc category.....LOL :
	() Thanks

29th March 2006, 16:44	#28
S@~+#0$# BHPian Join Date: Mar 2006 Location: Bangalore Posts: 700 Thanked: 43 Times View My Garage	To improve performacen, try and hunt for a High-compression head (popular with yezdi mechanics as "flower" because of its shape) for your yezdi. It used to come standard with one of the yezdi models not sure which. Also with regards to to expansion chamber, don't try 2 yamaha expansion chambers, there is a lot of calculation that goes into the design of an expansion chamber.... just try talking to other yezdi mechanics, you'll be able to source them. Good Luck with preparation of your drag yezdi bike. All the best for the drag as well.
	() Thanks

29th March 2006, 16:58	#29
cbr1000f BHPian Join Date: Sep 2005 Location: Mumbai. Posts: 148 Thanked: Once View My Garage	Either ways the DElhi Speedrun has been cancelled. Hard LUck mate. Get to know Yezdi mechanics in your city and slowly build it up.
	() Thanks