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Messages - sleepy

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Tech Talk / Re: Coil Ohms Readings
« on: July 20, 2018, 11:07:53 AM »
This may help if I can get it to work, IT175 diagram could be similar.
Can't workout how to load a PDF image. PM me an email address and I'll send it to you.

Tech Talk / Re: Coil Ohms Readings
« on: July 19, 2018, 10:37:17 PM »
That is the resistance value for the top coil, the one hooked to the spark plug.
Ignition coils have 2 windings inside , primary or low tension and secondary or high tension.

Tech Talk / Re: Changing exhaust
« on: July 14, 2018, 11:01:30 AM »
Good question. Bit like going to doctors for a diagnosis without telling him the symptoms.
In other words there is no way to know unless it is a common bike and a common pipe, even then there are so many armchair experts you would get 50 different answers. 

Tech Talk / Re: Alluminium disc rotors, your thoughts?
« on: July 14, 2018, 10:53:41 AM »
l wonder if the rules about titanium are for cost reasons or safety? l remember there was a safety issue with axles.

Not to sure on the reason but I know if it isn't machined correctly with sharp corners and the like it is very prone to failure.

Wanted / Re: yamaha dt1
« on: July 12, 2018, 10:21:51 AM »
Be difficult to make a replica as they are made in 2 halves from memory. I have one that I'm not using but have no plan to sell at this stage.

Tech Talk / Re: Alluminium disc rotors, your thoughts?
« on: July 12, 2018, 10:17:22 AM »
Aluminum rotors for use on front of speedway cars. Could be a little to thick for some bike calipers though at 8mm.,20054.html 

Tech Talk / Re: Alluminium disc rotors, your thoughts?
« on: July 09, 2018, 09:42:10 AM »
Alloy discs are quite common in open wheel speedway cars. Very critical to use the correct compound pads with them. Also using Titanium rotors now as well.,268419.html
Not cheap but very light.

Tech Talk / Re: Metal Filler
« on: June 23, 2018, 09:55:25 AM »
rapid fix 2 part supa glue. it is a supa glue and a "powder" addition for strength where needed. works great

I know it is fair size . I want fill the outer web on the case to drill a oil gallery  to feed the outer bearing with premix . ( Converting from pump to premix . )
You should show what you want to do to someone who welds bike engines for a living, if it's not to close to a gasket face or a bearing the distortion may not be a problem. My choice with that type of thing is to weld but if not possible I use Devcon FasMetal 10.

Yamaha / Re: YZ465H / YZ490 82 Piston Clearance
« on: June 20, 2018, 02:35:09 PM »
Service specs here.

82 YZ 490 clearance listed as .08-.085mm or about .0035"

Maico / Re: Maico 400 Mega 2, whats it worth.
« on: June 12, 2018, 04:01:16 PM »
The dilemma is to try and sell or not. Always nice to get so money for a rainy day.

Maico / Re: Maico 400 Mega 2, whats it worth.
« on: June 11, 2018, 06:25:52 PM »
Managed to get photo bucket to work.

Maico / Re: Maico 400 Mega 2, whats it worth.
« on: June 11, 2018, 04:56:59 PM »
Your pics don't show up for me Sleepy

What happens when you click the link? Maybe there is a setting to share them or something.
I have used Photobucket in the past but it has gone commercial.
I could Email them if you PM me an address.

I just tried to look at the photos after logging out of google and can't see them. Any other photo sharing thing around that work?

Maico / Re: Maico 400 Mega 2, whats it worth.
« on: June 11, 2018, 04:53:48 PM »
The bike can not be called original because it was a 250 MX.  Have you still got that motor?  A 490 will always be worth more.  A 250 MX is worth about 5 to 6 thousand so work from there.  Also as the motor is a GS it is also worth less, in my opinion.  The GS has a higher ratio 5th gear and final drive gear.

I only said it's original as there is not any of those horrible billet parts on it. But no the motor is not the original for that frame. No do not have the 250 motor.
The ignition is the only GS part on the bike as it makes for a smoother easier to start motor.

Maico / Maico 400 Mega 2, whats it worth.
« on: June 11, 2018, 09:53:02 AM »
I've been thinking of selling my 81 400 Mega 2 but have no idea what it's worth.
A few details about the bike. Frame is an 81 250 mx, motor 81 400 with GS ignition and 40mm Bing, also has just had a new sleeve and stock Mahle piston fitted as well as a new rod and main bearings.
It has near new tyres fitted to original wheels with original gold rims, forks are original with good chrome, shocks are Marzocchi and work quite well.
So I'd describe the bike as very original ready to race bike but it is not a bling covered show bike.
I'll try and post a couple of photos from Google.

Wanted / Re: Mikuni parts
« on: June 02, 2018, 03:39:48 PM »

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