Colder plugs in CB77 - D10?

[Jlovvorn]

I have searched but have found only one reference to running colder plugs in the CB77.

Anyone run the D10? Any interesting results?

I am continuing to try different things and manage my slightly lean condition and was hoping a slightly cooler plug might help.

The bike is running awesome, so I don't want to make any big changes.

[Vince Lupo]

Found this online -- a bit of info about plugs: http://www.ngk.com/charglossary.asp?kw=Heat+range

When I was wrestling with my own carb/plug issues last year, I explored this option. I even called NGK and spoke with one of their techs about it. Did you know that going from one plug heat range to the next is a 200 degree difference? So I think if you went to a 200 degree colder plug, might there be more of a chance of fouling them? Don't know if that would be an effective way to solve the slightly running lean situation -- I'd be looking more at the carb adjustments to fix that.

According to NGK, the D10's are only available in the UK, so you'd likely have to source them from a UK dealer, or eBay UK.

Have you looked at the adjustments in your carbs (float level, jets) to see why it might be running lean? Have you done any plug chops to see specifically where in the powerband it is running lean?

In terms of my own personal trials and tribulations last year, when all was said and done, and with all the work in the engine (350 kit, 5 speed transmission, Amal carbs blah blah blah), the D8's turned out to be the best option.

Bear in mind that these are the comments of a non-mechanic!

[Jlovvorn]

I have a whole box of D10HS because they are stock for the 160.

I have not run the test you mention and am not familiar with it. I will research it.

I think the pod filters I have are letting in too much air or my clamps on the intake hoses are weak - I can slip them off the carb intakes without much effort - that doesn't seem right to me.

Will try a better filter and see about that test.

[LOUD MOUSE]

Too much air???????????????. ......lm

I have a whole box of D10HS because they are stock for the 160.

I have not run the test you mention and am not familiar with it. I will research it.

I think the pod filters I have are letting in too much air or my clamps on the intake hoses are weak - I can slip them off the carb intakes without much effort - that doesn't seem right to me.

Will try a better filter and see about that test.

[Jlovvorn]

Yes. Too much air makes me too lean, right? Please tell me I at least got that right.

I can put the stock filters on but it will mean relocating my rectifier and my turn signal wiring.

Going to try K&N or Uni. The cheapo chrome filters I have I suspect are letting in too much air.

Or that I have a leak at the carb flange to the tubes.

Going the do the following, in order:

1. Replace tube bands with standard screw down plumbing clamp.

2. Try Uni or K&N filters.

3. Breakdown and go back to stock filters.

[LOUD MOUSE]

NO. ...........lm

Yes. Too much air makes me too lean, right? Please tell me I at least got that right.

I can put the stock filters on but it will mean relocating my rectifier and my turn signal wiring.

Going to try K&N or Uni. The cheapo chrome filters I have I suspect are letting in too much air.

Or that I have a leak at the carb flange to the tubes.

Going the do the following, in order:

1. Replace tube bands with standard screw down plumbing clamp.

2. Try Uni or K&N filters.

3. Breakdown and go back to stock filters.

[Jlovvorn]

Ok, I will play along.

If I take the filters off entirely and stuff a sock in each intake tube, will I be rich or lean?