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Post by alankelly on Jul 4, 2021 11:55:04 GMT 1
Here is another piccy that shows its size It funny when you are sat on it it’s really comfy and you feel like you are in it rather than on it if that make sense Any engine that produces a big amount of power or torque would make that a hard bike to ride. Totally agree Even with the pv engine at the moment I can lift the bike completely off the ground due to the size / weight of the bike Maybe a single would be a good match like a YZ490 or maybe a smaller single 250 / 350???
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Post by markhoopy on Jul 4, 2021 12:05:42 GMT 1
YZ490 engines aren't cheap and you would have to add a wheely-bar.
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Post by chrisg on Jul 4, 2021 12:46:19 GMT 1
Hi Alan, might not be the look that your going for, but some motorcross bikes have 2 smaller radiators to get the cooling capacity. May be an option. Looks good so far.
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Post by alankelly on Jul 4, 2021 14:33:43 GMT 1
Hi all
Just a quick message to say thank you for all the advise
Ok a couple of decisions made
It going to be air-cooled so no need to find a rad and when I could fit it to solve cooling issue
Engine will be either a 250 / 350 air cooled twin or a single maybe a bigger single to ensure bike not overpowered for its size and weight
First I will investigate to see if I can fit a rd250 twin with some frame changes to clear a finned engine, and if this idea looks no good then I will refocus on finding a suitable single and will be back for suggested options
At lest by doing the above I have a plan in my head
Like I said thanks for all the advise
Stay safe all
Best wishes Al
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Post by steve h on Jul 4, 2021 15:31:10 GMT 1
What was it bulit for/around in the first place? Did it start life as one of the road bikes with a 400 single suzuki engine? Looks right size for me... TZish.
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Post by alankelly on Jul 4, 2021 16:00:15 GMT 1
Hi Steve The frame itself was a one off built by Dave Pierce at Tigcraft for the original owner as a super mono race bike but I don’t know what the original engine was going to be (but somebody thinks it was built to race in the “Sound off singles” race series so it make sense it was designed for single due to the lack of space if you fit a LC motor) Then it was modified to fit a LC engine by the previous owner by TIgcraft but there is just no room in the normal place when the engine is if unless you fit side rads and maybe a fairing I bought it on a whim silly me and originally it was not even roller New Christmas Tigcraft project r.tapatalk.com/shareLink/topic?share_fid=106900&share_tid=46343&share_pid=427662&url=https%3A%2F%2Frdlccrazy%2Eproboards%2Ecom%2Fpost%2F427662%2Fthread%2F46343&share_type=t&link_source=appProject I must admit has been on and off for a while now due to the rad issue and other commitments but now other stuff is done its back on.I still want to keep the lightweight look and not cover it all up with a fairing etc so hence why I will go the air cooled route to avoid the above extras Now hopefully got a rd250 ac motor thank you another forum member so plan now is to scrap the pv idea and see if I can squeeze in a ac engine instead If I can then hopefully happy day if Dave can work his magic and fab up a 2into one exhaust exiting up The R/H side as even without the rad. exhausts routing will be another challenge due to space To finish its going to cost a small lottery win (don’t they all) but hopefully the end result will be worth it if you have a good imagination 😁😁 Best wishes Al
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Post by Tobyjugs on Jul 4, 2021 16:13:24 GMT 1
Hi Al if anyone can make it work you can. Such a great project.
For all the single cylinder fans out there, there is only one option.
A Zabel engine!!!
Is 80 hp enough?
Never feel your hands and feet again. Enough room to fit 2 radiators where the front of the YPVS should be and you won't have to change the front tyre again. Only con is it's made from lead when you try to lift the thing.
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Post by alankelly on Jul 4, 2021 16:15:20 GMT 1
Hi Al if anyone can make it work you can. Such a great project. For all the single cylinder fans out there, there is only one option. A Zabel engine!!! Is 80 hp enough? Never feel your hands and feet again. Enough room to fit 2 radiators where the front of the YPVS should be and you won't have to change the front tyre again. Only con is it's made from lead when you try to lift the thing. 😁😁😁😁
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Post by reedpete on Jul 4, 2021 18:36:41 GMT 1
Totally left field...another possibility might be an Aircooled RD200twin, fitted with LC carbs they Rev and Rev , smaller format motor but still a twin if that type of symmetry, twin pipes etc . Having seen the picture to put scale in perspective a 250/350 of any variety just seems too big/heavy. Downside is 200 twin engines are not that easy to find....but is anything? 🙈
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Post by alankelly on Jul 4, 2021 18:52:29 GMT 1
Hi Pete
All ideas welcome
A smaller engine is the way it’s moving
I got a rd 250ac engine lined up to borrow to see how big it really when sat next to the bike and see what changes would be needed with a tape measure
If it look like I can fit a twin Ac but the 250 is too big this is another option
Good thing is as it’s so light it won’t need a really powerfully engine and hopefully it will look quick just standing still😎
Best wishes Al
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Post by reedpete on Jul 4, 2021 19:15:46 GMT 1
250 AC bottom end is probably a non starter. The bottom rear mount will be too low and too far back... To run any type of 250/350 ac stuff you’d defo need to run it on a LC bottom end which is easy as the ac barrels drop on. Anyway as you say, best to go through the motions and offer air-cooled cases up, see how you’d end up.
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Post by shaunthe2nd on Jul 4, 2021 19:17:43 GMT 1
Alan, this looks really interesting, seems like you are in top of your 3D printing challenges. Good luck with this one, can't wait to see how it turns out. Shaun
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Post by alankelly on Jul 4, 2021 21:08:47 GMT 1
Alan, this looks really interesting, seems like you are in top of your 3D printing challenges. Good luck with this one, can't wait to see how it turns out. Shaun Hi Shaun Hope you are well Yes this is a challenge Been busy the last year doing other stuff and putting off the project but now it’s time to sort it out Think engine going to maybe a hybrid too LC cases with a AC top end 🤔but let’s see what is involved with a standard 250 ac motor first but at least with this approach the cooling issue is solved👍 Best wishes Al
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Post by 4l04ever on Jul 4, 2021 22:53:11 GMT 1
Maybe SDR200 engine...
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Deleted Member
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Post by Deleted on Jul 4, 2021 23:19:56 GMT 1
Totally left field...another possibility might be an Aircooled RD200twin, fitted with LC carbs they Rev and Rev , smaller format motor but still a twin if that type of symmetry, twin pipes etc . Having seen the picture to put scale in perspective a 250/350 of any variety just seems too big/heavy. Downside is 200 twin engines are not that easy to find....but is anything? 🙈 Great motors, but they're bloody wide with the electric start nonsense stuck on end of the crank.
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Post by JonW on Jul 5, 2021 0:30:17 GMT 1
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Post by bigdork on Jul 5, 2021 3:36:48 GMT 1
KTM 300 motor seems pretty light and compact.Parts easily available. Beautiful work on the frame BTW.
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Post by dusty350 on Jul 5, 2021 7:06:51 GMT 1
It seems a shame not to use the Pv motor, or the Lc motor as you have them. Plus they are such great looking engines, and we know them inside out for rebuilds, upgrading etc, plus the hard work has been done with the Tigcraft frame, in getting the engine to fit. So the issue is the rad. Earlier thoughts were for a rad mounted where the headlight would sit, which would be my preferred option if keeping the water cooled engine. As the guys have said, other bikes have had the rad mounted at the bars, and can look really trick if done right. A lot depends on where you intend to use the bike. Trackday only isn't an issue. Road bike means daytime only MOT unless you can fit some small ish headlight. On that subject, there are some great lights that are tiny compared to what we are used to. If it were me, I would go with a trick rad up top and daytime MOT, and then it becomes more of a Cafe racer in spirit. You wont see another for sure !! A pair of nice pipes made to fit would look awesome Dusty
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Post by peddrotzr on Jul 5, 2021 10:44:27 GMT 1
As the engine is in, you could fit two radiators as I did on my TZR as I was struggling for space to fit one decent size radiator. So I fitted one in the usual place and the other in the nose fairing under the dashboard, I also fitted a 50mm duel beam projector head light, and the side light is a small LED light about 20mm so its got a full MOT
Obiously I had to drill holes in the fairing to get the air into the radiator.
I hope that helps
Best regards Johnny C.
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Post by stirling11 on Jul 5, 2021 13:54:30 GMT 1
Wow Johnny
That is really, really cool
One very nice bike you’ve built
A great idea for Alan
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Post by 4l04ever on Jul 5, 2021 18:39:31 GMT 1
Rotax Tandem Twin 250... or the FPE variant...
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Post by hicky375 on Jul 5, 2021 19:17:02 GMT 1
Rotax Tandem Twin 250... or the FPE variant... I bet that's pretty lively! Looks compact width wise as well.
I used to run one of these www.ebay.co.uk/itm/174676154714?_trksid=p2485497.m4902.l9144 in a Spondon frame when i used to race in the FRC in the 90's. As said above,very rare to find now and expensive going by the price of this one. Was a very light engine though and pushed out around 45hp in standard form from what i remember. Was competetive in it's class but no doubt half the power that FPE motor will have.
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Post by Chewie01 on Jul 5, 2021 20:00:04 GMT 1
If you could get your hands on one a YZ250WR would be an awesome engine. Enough power for the bike, small in size so you would have enough room to fit the 2 small rads. And unlike most other moto X engines it has a wide ratio gear box and a stator with a lighting coil built in.
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Post by abar121 on Jul 5, 2021 20:15:41 GMT 1
How about a KTM690 motor? They make a good 60bhp, are pretty smooth and love a good thrashing.
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Post by JonW on Jul 6, 2021 0:24:09 GMT 1
If you could get your hands on one a YZ250WR would be an awesome engine. Enough power for the bike, small in size so you would have enough room to fit the 2 small rads. And unlike most other moto X engines it has a wide ratio gear box and a stator with a lighting coil built in. yes thats the WR I was thinking of as well.
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Post by jon on Jul 10, 2021 10:48:33 GMT 1
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Post by botty on Jul 10, 2021 19:19:00 GMT 1
I’d be looking to see if a Ktm 690 motor would go in there.
Great project👌👌
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Post by morgy on Feb 3, 2022 16:18:54 GMT 1
Is it not possible to have a custom rad made up to go in between the frame on top of the cylinders and have a Small Fan on top, Add a little air scoop for the rad for air flow while traveling.. Looks like there is plenty of room.
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Post by mangocrazy on Feb 4, 2022 22:16:12 GMT 1
You could always take a leaf out of John Britten's book and run an underseat radiator. You'd need to ensure it got a resonable amount of air flowing through it, but it would make for a very clean looking install. And would fool the hell out of a lot o people...
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