1975 Yamaha RD350(LC) Preservation-mod Hellride

[irk miller]

Here is my first (probably of several) coolant pump attempts. I like the location of one port, but not the other. It fits well under the cover. This unit is a Prius inverter coolant pump.

 

[ex119x]

For the outlet that come out of the center, could you 90 right as it exits the pump and bring it out parallel to the other one? Maybe you could keep it all under the cover or put a small pump out in the cover.

 

[irk miller]

For the outlet that come out of the center, could you 90 right as it exits the pump and bring it out parallel to the other one? Maybe you could keep it all under the cover or put a small pump out in the cover.

No way to get the outlet from the center under the cover, but there are alternate versions of this same pump that 90 degree elbows that fitting. No reason I can't do the same with this pump. It may be more about deciding if this pump in fact goes under that cover, or gets hidden somewhere else. I am also considering casting an alternate version of this cover that is deeper to fit everything underneath.

 

[irk miller]

Let’s call this version 1a. This is made with a spare cover. It actually works.

 

[teazer]

Have you looked at the possibility of fitting a TZ pump? You need a pump, adapter plate and that's about all. The adapter plate is just 1/4" aluminum plate cut to the same shape as a TZ pump gasket. and use an RD oil pump gear to drive it.

 

[ex119x]

I think a 90 out of the pump and a bump on the cover over it would look great, very custom. Casting a new cover or making one out of CF would look very good. Maybe even make the cover be the 90 and just fit an o-ring to the stub left on the pump.

 

[irk miller]

Have you looked at the possibility of fitting a TZ pump? You need a pump, adapter plate and that's about all. The adapter plate is just 1/4" aluminum plate cut to the same shape as a TZ pump gasket. and use an RD oil pump gear to drive it.

Honestly, I haven't even looked at TZ pumps because of what people ask for them. I'm very open minded about using one, if one presents itself for less than a million bucks. That up there is a $35 pump for sale all over the internet. It runs 1.78 amps @ 12v, so just around 21 watts. I may still go with hiding it somewhere else on the bike. I wanted to run with this idea first.

 

[irk miller]

Locating the TM32 carbs. Straight air filters kinda don’t work.

Am I porting these reed cages to match the carb boots? That seems like something I should do. Get rid of these little shelves.

 

[teazer]

That looks really tasty.

Are those stock RD reed cages and boots? They are restrictive. You can open them up as best you can but try a pair of YZ85 reed blocks. They are wider than RD but not as wide as RZ350/Banshee, but they flow more than either. The picture has RD on the left, RZ350 right and YZ85 in the middle.

I agree that a cheap working electric pump has to be better than a million dollar TZ pump, but keep your eyes open for one.

 

[irk miller]

Ordered a set of yz reed cages to try out.

I haven’t been too keen on clip ones for quite awhile, but we’ll give them a try here.

 

[ex119x]

Not to be critical, but the usd forks don't look like they belong with the twin rear shocks, to me. Maybe a monoshock aluminum swingarm from an IT or YZ could work.

 

[irk miller]

Those aren't the rear shocks I'm going to end up using, not that it will change your mind. Thinking about going with an XS front end a guy on 2strokeworld has for sale, but I don't see the USD the same way you do either. I also wonder if part of the issue is the clip ons. I typically prefer the Renthal street bars.

 

[Maritime]

I like the USD forks. Not sure the clipons will be comfortable but this isn't a long distance ride so prob not a huge deal.

 

[irk miller]

I'm going to modify the TZ front fender, too. I think that will change a lot of the look of the front end.

 

[ex119x]

I will trust your sense of the aesthetic, but for me, the usd forks push the front into a little more modern look and the twin shock rear looks a little more old school. The chrome shocks don't help.
I am sure it will look cool when you get it together.

 

[teazer]

I totally get what you are saying, and I don't disagree that back end and front end can look out of synch, and on such a light bike the front end looks maybe a bit chunky, but I like the mix and match. I also like the TZ fender as it is, so it seems that we can't all agree on what looks right and that's probably a good thing.

Maybe a thinner set of say Cagiva Mito forks might look even better, but none of has a set of those to play with outside of say Europe or Australia. More's the pity.

Just thinking out loud again, but the fork spring rates and damping will probably be a bit too heavy for this light bike and may need to be tweaked a bit.

 

[irk miller]

Ideas evolve and good feedback helps it along.

I got to thinking about that front end. I have a really nice YZF600r front end. Same year to match the rotors that fit the GL1000 hubs I built these wheels from, so it’s a natural swap. More modern performance, but a conventional style fork.

 

[Hurco550]

I thought that front axle was re-bar for a second lol

 

[irk miller]

I thought that front axle was re-bar for a second lol

It could be. HAHA

 

[irk miller]

I got the YZ85 reeds and fresh petals in the mail.

Proof of concept on the Thundercat front end.