Go Back   Team-BHP > BHP India > Motorbikes


Reply
 
Thread Tools Search this Thread
Old 24th April 2009, 23:27   #46
Distinguished - BHPian
 
Join Date: May 2005
Location: KL
Posts: 4,680
Thanked: 3,507 Times
Default

Quote:
Originally Posted by pedrolourenco View Post
@jkdas
You can check these threads out
http://www.orkut.co.in/CommMsgs.aspx...4993&kw=Decomp


http://www.orkut.co.in/Album.aspx?ui...aid=1218440560

Someone has done a twinspark conversion with the decomp modification.
Yes, i know that guy. We did meet when he was at Tvm while on his way for 2008RM. I think he is a member here as well, or it maybe it's his brother who's here.

I didn't need the decomp lever on my Bullet, or any Enfield i tried on till now, have a very good right leg Once you get the hang of it you won't miss the decomp thingy.
Sankar is offline   Reply With Quote
Old 29th April 2009, 11:00   #47
BHPian
 
Join Date: Feb 2009
Location: Bangalore
Posts: 73
Thanked: 22 Times
Default

My 2007 RE Thunderbird (4000 Kms done) failed emission testing : Need help urgently

Hi Guys,

I had taken my RE ThunderBird for a emission testing yesterday and the bike failed the test. according to the guy at the emission test centre the problem was due to carburator and at the same time he told me that that bike might be giving me 20 - 25 kms / litre of fuel. but as per my log my bike has been giving me 38-40 kms / litre for the last 2 months.

not sure what could be wrong any ideas?

as per the emission test
the CO level was to be 3.5% max but while testing the CO level went upto 4.5%.

can somebody help me with the details why the levels increased this much?

also during the previous testing the CO level was 1.35%.

your help is very much appreciated.

Cheers,
Sam

<Moderators: can you please create this as a new thread>
SAMUDRA is offline   Reply With Quote
Old 29th April 2009, 21:44   #48
BHPian
 
pedrolourenco's Avatar
 
Join Date: Apr 2009
Location: Margao, Goa
Posts: 756
Thanked: 446 Times
Infractions: 0/1 (4)
Default

Quote:
Originally Posted by SAMUDRA View Post
My 2007 RE Thunderbird (4000 Kms done) failed emission testing : Need help urgently

Hi Guys,

I had taken my RE ThunderBird for a emission testing yesterday and the bike failed the test. according to the guy at the emission test centre the problem was due to carburator and at the same time he told me that that bike might be giving me 20 - 25 kms / litre of fuel. but as per my log my bike has been giving me 38-40 kms / litre for the last 2 months.

not sure what could be wrong any ideas?

as per the emission test
the CO level was to be 3.5% max but while testing the CO level went upto 4.5%.

can somebody help me with the details why the levels increased this much?

also during the previous testing the CO level was 1.35%.

your help is very much appreciated.

Cheers,
Sam

<Moderators: can you please create this as a new thread>
Just ask the service centre to tune the bike. That should solve the problem. If they can't rectify it, take them to the consumer court
pedrolourenco is online now   Reply With Quote
Old 30th April 2009, 11:43   #49
BHPian
 
srijit's Avatar
 
Join Date: Jan 2008
Location: Trivandrum
Posts: 594
Thanked: 6 Times
Default

Have you tried another PUC centre? And do you really think that you can take the garage people to consumer court?
srijit is offline   Reply With Quote
Old 30th April 2009, 12:08   #50
Senior - BHPian
 
lohithrao's Avatar
 
Join Date: Feb 2007
Location: Kudla/Mangaluru
Posts: 3,125
Thanked: 163 Times
Default

ahh nice this bike is used to the mods for a long time i remember

good going guys!
lohithrao is online now   Reply With Quote
Old 30th April 2009, 14:20   #51
Distinguished - BHPian
 
Join Date: May 2005
Location: KL
Posts: 4,680
Thanked: 3,507 Times
Default

OT: Lohith your signature is so very true!!

" Everyone wants to park their car/bike in the shade(of a tree) but none wants to grow one!, SAVE TREES/GROW TREES"
Sankar is offline   Reply With Quote
Old 25th November 2009, 08:31   #52
BHPian
 
Darth Sid's Avatar
 
Join Date: Nov 2009
Location: Noida
Posts: 306
Thanked: 114 Times
Default Plug Specs

Hi Sankar,
Old thread, I know but didn't know where else to start. My first post!
That's quite a rig you prepared and sold.
I'm curious, what are the specifications of the Bosch Super 4 you used in the decomp opening? And, how did you manage to maintain compression with the decomp valve out? Did the plug itself seal the opening into the exhaust port? Did you have to do any machining? I was planning to install a second plug for better efficiency and smoothness in my '79 350 Std.
Thanks.
Darth Sid is offline   Reply With Quote
Old 25th November 2009, 08:59   #53
Distinguished - BHPian
 
Join Date: May 2005
Location: KL
Posts: 4,680
Thanked: 3,507 Times
Default

I don't remember the Bosch plug number if i can find the plug i shall let you know.
Decomp seat is turned on a lathe until the threaded part starts. Once metal is taken off till the threaded part the small hole that vents decompressed charge into the exhaust port becomes visible. I filled up the hole with araldite mixed with a little bit of aluminum dust and set it to set for a day. This hole is not going to the combustion chamber but to the exhaust port so a seal that could withstand high pressures are not really necessary. Combustion chamber is sealed off when the second plug is installed.
Sankar is offline   Reply With Quote
Old 26th November 2009, 00:43   #54
BHPian
 
Darth Sid's Avatar
 
Join Date: Nov 2009
Location: Noida
Posts: 306
Thanked: 114 Times
Default

Sounds like a lot of metal needs to be shed to get to the thread and that the process is not reversible.

Did the Bosch plug have a longer thread than the stock plug? After shaving the decomp seat, was the thread as long as the normal plug thread or longer?

Araldite and aluminium dust?? Sure aluminum dissipates heat quickly but can't the epoxy still crack, chip and fall into the exhaust port? When you screw the plug in, surely it can't perfectly seal off the combustion chamber from the decompressor port without... Araldite. The seal may not be subjected to high pressures but some sealing agent is obviously still required. But, Araldite?

Also, I'll have to use the two 6V coils in parallel. That would put a drain on the battery at low RPM. Man, the 6V electrical system can be quite a pain to manage sometimes...
Darth Sid is offline   Reply With Quote
Old 7th January 2011, 14:30   #55
Distinguished - BHPian
 
Join Date: May 2005
Location: KL
Posts: 4,680
Thanked: 3,507 Times
Default Re: The Twin Spark Psyched Bull !

Quote:
Originally Posted by Darth Sid View Post
Sounds like a lot of metal needs to be shed to get to the thread and that the process is not reversible.

Did the Bosch plug have a longer thread than the stock plug? After shaving the decomp seat, was the thread as long as the normal plug thread or longer?
Its been a long time since i visited this thread.
It was a long thread plug.

Quote:
Araldite and aluminium dust?? Sure aluminum dissipates heat quickly but can't the epoxy still crack, chip and fall into the exhaust port? When you screw the plug in, surely it can't perfectly seal off the combustion chamber from the decompressor port without... Araldite. The seal may not be subjected to high pressures but some sealing agent is obviously still required. But, Araldite?
The hole i sealed is outside the combustion chamber and does not see any combustion pressures. With the decomp valve actuated the hole diverts the pressure released by the decomp valve into the exhaust port (after the exhaust valve). All it does is channel the hot gases when decomp is actuated. With no decomp valve it gets no pressure/hot gases in it.
Sankar is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Royal Enfield Thunderbird with Twin Spark madbullram Motorbikes 125 17th July 2013 12:46
Red Bull Racing Cans: Chance to visit the Red Bull Racing HQ in Milton Keynes varun_patra Indian Motorsport 0 22nd July 2011 15:51
Thunderbird Twin Spark Modifications NikhilSorot Motorbikes 5 7th January 2009 23:02
Totally Psyched Out! Steeroid Modifications & Accessories 61 12th June 2007 21:48


All times are GMT +5.5. The time now is 14:12.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks