engine mods??

[2000mc]

Originally Posted by bschloop

Well, specific info and aftermarket parts pretty much don't exist for this bike. I could check if the stator from a TW200 would fit. I don't know that it's worth the hassle tho. How much damage would it do if I screwed up when advancing the ignition?

You may be able to slot the holes on your existing stator plate. You don't have to have a lot of extra material / grind out the holes very far, to get a degree of advance. Might also google images of modified stator plate. How much damage could be done? Aside from the stator plate itself, if your timing is advanced too far you could have bad enough detonation to destroy your engine. Years ago I did this on a yamaha banshee, which there is a large aftermarket for and huge tuning knowledge base. So I had heard from multiple sources that you could safely run 4 degrees of advance, and that that was about the maximum the oe stator plate could be carved out to. So my modification was fairly worry free, and 4 degrees seems huge for a manufacturer to leave on the table. In terms of increased power, this was easily the best free engine mod I have ever done to any vehicle.

[renault_megane_dci]

Does advancing timing make the engine less tolerant to hot climate ?

[bschloop]

I did some reading on internal engine coatings, and these seem to be a great idea. If I can afford it coating the head, piston top, piston skirt and do the outside with a heat dispersion coating. If I did all this I could bring down the engine temp. All the discussions I've read also agree that they can result in more efficient burn, and increased performance. Sounds like a lot of bang for the buck.

[2000mc]

Originally Posted by renault_megane_dci

Does advancing timing make the engine less tolerant to hot climate ?

i dont think its necessarily, hot climate, but actual engine temp. and engine temp as a factor in detonation.

it was thought the yamaha banshee could be safely advanced so far because the engine was essentially a RD350 engine (air cooled street motorcycle) that yamaha added water cooling to and stuck it in a quad. presumably yamaha was either too lazy, or playing it very safe, and left the timing the same.

[renault_megane_dci]

Hot climate means hotter air hence leaner mixture and less efficient air cooling, that sums up my concern.
If I were too advance my timing, I would definitely tune the bike to run on the rich side.

That being said, what helps power might not show up in the RPM range we usually use for FE riding.

[2000mc]

Originally Posted by renault_megane_dci

Hot climate means hotter air hence leaner mixture and less efficient air cooling, that sums up my concern.
If I were too advance my timing, I would definitely tune the bike to run on the rich side.

That being said, what helps power might not show up in the RPM range we usually use for FE riding.

assuming the same jetting, the hotter it is the richer the bike runs. i would always jet leaner in the summer, richer in the winter

i've thought reduced cooling at higher temps was more about temperature differential than air density, either way though... hotter conditions = less cooling

power torque work... yea, i should have been more specific
i thought the timing advance helped most at low rpm and tapered off alot at high rpm, however, i've wondered if this might be exaggerated in a 2 stroke vs 4 stroke

[jkv357]

Originally Posted by 2000mc

i dont think its necessarily, hot climate, but actual engine temp. and engine temp as a factor in detonation.

it was thought the yamaha banshee could be safely advanced so far because the engine was essentially a RD350 engine (air cooled street motorcycle) that yamaha added water cooling to and stuck it in a quad. presumably yamaha was either too lazy, or playing it very safe, and left the timing the same.

The Banshee engine is based on the RZ350 engine, a much advanced version of the RD engine with liquid cooling, reed valves, and movable power valves in the exhaust ports. I'm pretty sure there are no interchangeable parts between a RZ and RD engine.

I owned both back in the day.

[2000mc]

But the rz has power valves the banshee didn't. Banshee engine would be more similar to the rd350lc... which I just found out about. wish info was so easy to find back when I was playing with my banshee.

More importantly.... Ever advance the timing on either bike?

[jkv357]

I dunno - I've always heard the Banshee engine referred to as an RZ engine.

Advancing the timing didn't seem to be a common mod to the RZ way back when, that I recall.

[bschloop]

Here's another thought. I could set up an egr system. Just tap into the muffler and pipe a small amount of exhaust gas through a copper pipe into the intake.question is how would this affect FE and performance?