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Post by 29davyt on Nov 3, 2021 13:30:37 GMT 1
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Post by chrisg on Nov 3, 2021 13:45:06 GMT 1
Probably not ideal for road use. Track bike?
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Post by steve63 on Nov 3, 2021 13:49:28 GMT 1
No tickover. 3,000rpm to pull away and 4000 to 8000rpm - 15hp, 8,100 to 10,000rpm - 72hp  Difficult/fun (depends on your point of view) to ride on the road is an understatement. They take some balls/skill to master. I saw a full on TZ350 parked up at Squires Café back in about 1983/4 when they had that much smaller place. Perhaps he was just running it in. I never stuck around long enough to see him leave. Not for me. I don't need an easier way to crash. Someone on here buy it and do a video  . Peddrotzr? |
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Post by oldelsieboy on Nov 3, 2021 14:11:04 GMT 1
If you're gonna do it, do it properly 😁 OEB   |
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Post by 29davyt on Nov 3, 2021 14:11:20 GMT 1
No tickover. 3,000rpm to pull away and 4000 to 8000rpm - 15hp, 8,100 to 10,000rpm - 72hp Difficult/fun (depends on your point of view) to ride on the road is an understatement. They take some balls/skill to master. I saw a full on TZ350 parked up at Squires Café back in about 1983/4 when they had that much smaller place. Perhaps he was just running it in. I never stuck around long enough to see him leave. Not for me. I don't need an easier way to crash. Someone on here buy it and do a video . Peddrotzr? Doesn’t sound like much fun on the road then Steve, bet it doesn’t half take off though when it eventually hits 8100 rpm 🏍 |
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Post by veg on Nov 3, 2021 15:18:53 GMT 1
They aren’t as intractable as he says mine pulls ok but does come in with a bang it’s just an Lc on steroids. It is feckin loud though.
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Post by reedpete on Nov 3, 2021 16:20:47 GMT 1
They aren’t as intractable as he says mine pulls ok but does come in with a bang it’s just an Lc on steroids. It is feckin loud though. Tim, Isn’t yours Reed valve? this is piston port. |
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Post by veg on Nov 3, 2021 16:25:21 GMT 1
Aaahhh it’s 350 barrels my mistake Pete I’d assumed wrongly it was 700/750 barrels that’ll learn me 😁.
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Post by steve63 on Nov 3, 2021 18:02:32 GMT 1
My mate had an E model. He rode it for the first time at Carnaby 1983 maybe 1984. He finished last in the 350 open. We never appreciated at the time how challenging they are to ride. In all the times we were in the same race he never beat me but I was riding a 350LC, a bike I was familiar with and had been riding on the road for a year. In all honesty he was faster than me but the TZ needed a lot of effort to use the extra power. In most situations the LC was easier to ride fast.
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Post by Tobyjugs on Nov 3, 2021 18:30:06 GMT 1
If you're gonna do it, do it properly 😁 OEB This is a great bike Nigel. The engine intrigues me. Is it a TZ engine with a kickstart or a tricked out 4LO engine with standard gears and TZ primaries? |
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Post by oldelsieboy on Nov 3, 2021 18:35:15 GMT 1
If you're gonna do it, do it properly 😁 OEB This is a great bike Nigel. The engine intrigues me. Is it a TZ engine with a kickstart or a tricked out 4LO engine with standard gears and TZ primaries? It's a TZ engine with an aftermarket primary cover. OEB |
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Post by Tobyjugs on Nov 3, 2021 18:40:22 GMT 1
That really is the best then. 👍
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Post by markhoopy on Nov 4, 2021 1:25:23 GMT 1
No tickover. 3,000rpm to pull away and 4000 to 8000rpm - 15hp, 8,100 to 10,000rpm - 72hp I saw a full on TZ350 parked up at Squires Café back in about 1983/4 when they had that much smaller place. Perhaps he was just running it in. I never stuck around long enough to see him leave. Someone on here buy it and do a video . peddrotzr? That was Frushy - Gary Thrush - on his older brothers TZ. The reg plate was off his proddy 350LC which kind of made it legal for road use |
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Post by steve63 on Nov 4, 2021 12:59:37 GMT 1
Really? That's great. I have a photo of it somewhere. I'll try to drag it out.
Gary Thrush was someone who could get the best out of a TZ350. He was just in front of me at Carnaby riding a YPVS and sat up just out of the chicane, looked around at me as if he's thinking "is that the best you can do?"and then cleared off. I had the privilege of being humiliated by some very quick riders like Thrushy, Dean Askin and Charlie Corner in my mediocre racing career. I was saddened to hear what happened to him.
I like your definition of legal BTW 😂
It was the 80's so you may be correct. I doubt they could catch him if he wanted to get away though.
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Post by chrisg on Nov 4, 2021 13:45:16 GMT 1
I think the better conversion is using the TZ700 cylinders or TZ750, can't remember which one
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Post by abar121 on Nov 4, 2021 14:08:07 GMT 1
I remember seeing a TZ engined LC race bike at Heston servies, way back. It looked pretty cool leant onto the entrance door to the services, to keep it upright. No lights, nothing |
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Post by steve63 on Nov 4, 2021 15:45:10 GMT 1
I think the better conversion is using the TZ700 cylinders or TZ750, can't remember which one The 750 would be the reed valve one so better mid range without a doubt. The 700 is two TZ350 cylinders so piston ported and a bit of a light switch power delivery. Using modern standards there will be quite a few LC's with as much or more power than these conversion now. Muttsnuts YPVS/Aprillia has 99hp. The F2 race LC's were rumoured to have getting on 75/80hp. Mark Westmoreland won the 350 open class National Championship on one in 1984 or 85. If you had a TZ block you would have to fit it though wouldn't you 😃 |
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Post by steve63 on Nov 4, 2021 15:45:57 GMT 1
I remember seeing a TZ engined LC race bike at Heston servies, way back. It looked pretty cool leant onto the entrance door to the services, to keep it upright. No lights, nothing Remember the TZ750 on the road article in Superbike Magazine? |
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Post by abar121 on Nov 4, 2021 16:10:20 GMT 1
I remember seeing a TZ engined LC race bike at Heston servies, way back. It looked pretty cool leant onto the entrance door to the services, to keep it upright. No lights, nothing Remember the TZ750 on the road article in Superbike Magazine? I don't, that would have been lively. A mate was racing a TZ750 in the Biker's classic event at Spa. Unfortuantely it's a big money race now and it's not competitive against the new / old tech four stroke litre bikes. I do remember a friend that used to run in his Yoshi tuned GS750 endurance bike, on the M27. Flat out, plug chops and burnt fingers |
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Post by veg on Nov 4, 2021 16:21:10 GMT 1
Mine is a tz700
And is definitely not piston ported it is a Reed valve barrel. I didn’t do 350 barrels because they aren’t Reed valve
The 700 barrels give you 350 the 750 375
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Post by steve63 on Nov 4, 2021 17:07:34 GMT 1
Mine is a tz700 And is definitely not piston ported it is a Reed valve barrel. I didn’t do 350 barrels because they aren’t Reed valve The 700 barrels give you 350 the 750 375 I always presumed the 700's were derived from the 350 and the 750 was 2x 375 reed valve cylinders. The 500 inline was also piston ported. I remember a few 500's.for sale around £1500 in about 1984/85. I actually thought about it. Would have ended badly I think. The bigger ones were all snapped up by sidecar guys and then they snapped up the 350's for F2 sidecars. |
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Post by steve63 on Nov 4, 2021 17:09:53 GMT 1
Remember the TZ750 on the road article in Superbike Magazine? I don't, that would have been lively. A mate was racing a TZ750 in the Biker's classic event at Spa. Unfortuantely it's a big money race now and it's not competitive against the new / old tech four stroke litre bikes. I do remember a friend that used to run in his Yoshi tuned GS750 endurance bike, on the M27. Flat out, plug chops and burnt fingers Joey Dunlop and his crew did all their testing on the roads around his place. My workmate had permission from work to use the car park at weekends to run up his Maxton 350. The car park was built on an old drain so quite long. |
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Post by veg on Nov 4, 2021 17:22:36 GMT 1
Mine is a tz700 And is definitely not piston ported it is a Reed valve barrel. I didn’t do 350 barrels because they aren’t Reed valve The 700 barrels give you 350 the 750 375 I always presumed the 700's were derived from the 350 and the 750 was 2x 375 reed valve cylinders. The 500 inline was also piston ported. I remember a few 500's.for sale around £1500 in about 1984/85. I actually thought about it. Would have ended badly I think. The bigger ones were all snapped up by sidecar guys and then they snapped up the 350's for F2 sidecars. I wasn’t sure until I researched them. It’s a bloody expensive modification to do esp as they are rarer than hens teeth now. You won’t get change from over a grand now for head and barrels then the Reed blocks then the inlet rubbers are extortionate plus all the ancillary bits and bobs id not do it today that’s a certainty. |
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Post by reedpete on Nov 4, 2021 17:56:28 GMT 1
Made all the more confusing since although the original TZ700 bikes was Reed valve, as the engines found there way into side cars, some builders swapped top ends to use the 3G3 barrels.
So there were a fair few piston port ‘tz700’s outfits about.
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Post by steve63 on Nov 4, 2021 19:44:34 GMT 1
The guy with the Maxton 350 said around 1983 when the Honda NS500 triple came out that because it had reed valves and was only a triple and the middle cylinder exhaust had such a tight route then it would be so down on power compared to the Yamaha and Suzuki it wouldn't stand a chance in GP's or any other racing. In fact he said that reed valve engines would never do any good because the reeds Rob too much power. He really didn't like production bike racing at all either.
He couldn't have been any more wrong about reed valves as it turned out.
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Post by steve63 on Nov 4, 2021 19:52:15 GMT 1
I always presumed the 700's were derived from the 350 and the 750 was 2x 375 reed valve cylinders. The 500 inline was also piston ported. I remember a few 500's.for sale around £1500 in about 1984/85. I actually thought about it. Would have ended badly I think. The bigger ones were all snapped up by sidecar guys and then they snapped up the 350's for F2 sidecars. I wasn’t sure until I researched them. It’s a bloody expensive modification to do esp as they are rarer than hens teeth now. You won’t get change from over a grand now for head and barrels then the Reed blocks then the inlet rubbers are extortionate plus all the ancillary bits and bobs id not do it today that’s a certainty. Only if you happen to find a TZ cylinder knocking around in the garage 😃 I've got some 4L0 cylinders that are quite enthusiastically ported shall we say. Matched with a set of F2 exhausts and some nice carbs and maybe cut down pistons it could be close to F2 power. Be ok as a track bike but too peaky noisy and fragile to go far on the road at my age. On my long list of things to do 😃. My mates TZ350E. Carnaby 1984.  |
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Post by reedpete on Nov 4, 2021 20:27:44 GMT 1
And a proddy valve in the background….those were the days!
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Post by steve63 on Nov 4, 2021 20:54:18 GMT 1
And a proddy valve in the background….those were the days! Possibly Bernie Usher and his highly trained pit crew but I don't know where that came from. Some distant 1984 memory. Although my memory of 1984 is better than my memory of last week. |
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. Peddrotzr?
