My Z900 is fitted with BT45s and seems to follow white lines and any imperfections in the road - tyre pressures are set at 28/32.
I understand TT100s are available and were the tyres to have back in the 70s/80s - but would TT100s improve matters as I had no issues back then that I recall, what's the general opinion of the 'modern' versions?
Cheers
Andrew
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BT45s Vs TT100s
Moderators: paul doran, Taffus, KeithZ1R, chrisu
BT45s Vs TT100s
Current Bikes:
Phil Churchett's 1976 Z900 A4: PRE 2R https://www.flickr.com/photos/115740825@N05/albums/72157680116996884
1973 XL250 K0 Motosport: UKX 73L
2023 R1250 GSA
Previous Zeds: Z750B1 Twin, Z650B1, Z750E
Phil Churchett's 1976 Z900 A4: PRE 2R https://www.flickr.com/photos/115740825@N05/albums/72157680116996884
1973 XL250 K0 Motosport: UKX 73L
2023 R1250 GSA
Previous Zeds: Z750B1 Twin, Z650B1, Z750E
Re: BT45s Vs TT100s
I run slightly larger sizes on my A4 - (Front: 100/90-19 Rear: 130/80-18) and having done 1000 miles think they perform great - good enuff to scrape the pegs!
They're what's fitted to the W800 as standard..... and also got some on my W650 with no probs.
They also look better (IMHO) as they were fitted back in the day rather than the modern tread pattern.
They're what's fitted to the W800 as standard..... and also got some on my W650 with no probs.
They also look better (IMHO) as they were fitted back in the day rather than the modern tread pattern.
And on the 7th day... Zeds were created!
Re: BT45s Vs TT100s
Never had a problem with bt45s
Try 32/36
Try 32/36
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- ZedHead
- Posts: 1128
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- Contact:
Re: BT45s Vs TT100s
I haven't tried the BT45s, but I agree 28/32 is too low.
32/36 is a good starting point, maybe even 34-36/38. See what works best for you.
32/36 is a good starting point, maybe even 34-36/38. See what works best for you.
Cheers,
Mark.
Mark.
Re: BT45s Vs TT100s
Always feel rider weight has a contribution,heavier seems better ,together as stated higher pressures for the modern rubber.As far as handling always find taper head bearings and 15 weight oil in the forks seems to help,mind you the state of some of the roads all you seem to do is be looking for the next pothole...Paul J
PAULJAC47,,,,,"She may not look like much, but she's got it where it counts, kid."
-Han Solo
You can't polish a turd, but you can roll it in glitter
Salad is what real food eats.
Anon
PUM 673
-Han Solo
You can't polish a turd, but you can roll it in glitter
Salad is what real food eats.
Anon
PUM 673
Re: BT45s Vs TT100s
Thanks for all the feedback - I reset the pressures at 28/32 as per the handbook for a single rider, my weight is about 86kg (13st/5lbs). Been out riding today and upped it to 32/36, which reduced the tyres tracking but it still doesn't quite feel right so will increase gradually until I get it right, or at least as good I can get it.
Useful advice about fork oil weight and taper bearings Paul, I'll look into that, thanks - the rear std shocks appear new and are set on the middle setting, so will experiment with those too.
Cheers
Andrew
Useful advice about fork oil weight and taper bearings Paul, I'll look into that, thanks - the rear std shocks appear new and are set on the middle setting, so will experiment with those too.
Cheers
Andrew
Current Bikes:
Phil Churchett's 1976 Z900 A4: PRE 2R https://www.flickr.com/photos/115740825@N05/albums/72157680116996884
1973 XL250 K0 Motosport: UKX 73L
2023 R1250 GSA
Previous Zeds: Z750B1 Twin, Z650B1, Z750E
Phil Churchett's 1976 Z900 A4: PRE 2R https://www.flickr.com/photos/115740825@N05/albums/72157680116996884
1973 XL250 K0 Motosport: UKX 73L
2023 R1250 GSA
Previous Zeds: Z750B1 Twin, Z650B1, Z750E
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- Hardcore
- Posts: 1329
- Joined: 18th Jul 2008
- Location: Derbyshire/London
Re: BT45s Vs TT100s
Andrew,
I was advised and run 35F 37R with no problems.
Regards
Steve
I was advised and run 35F 37R with no problems.
Regards
Steve
Re: BT45s Vs TT100s
wilsonsjw11 wrote:Andrew,
I was advised and run 35F 37R with no problems.
Regards
Steve
Thanks Steve - interestingly I spoke with a Z1OC member at a local bike meet last night who is running the handbook settings (28/32) with no major issues.
The head-race, and wheel bearings all seem ok, so maybe it could be the age of the tyres - will check the date codes but believe they may be a well over 5 yrs old.
Cheers
Andrew
Current Bikes:
Phil Churchett's 1976 Z900 A4: PRE 2R https://www.flickr.com/photos/115740825@N05/albums/72157680116996884
1973 XL250 K0 Motosport: UKX 73L
2023 R1250 GSA
Previous Zeds: Z750B1 Twin, Z650B1, Z750E
Phil Churchett's 1976 Z900 A4: PRE 2R https://www.flickr.com/photos/115740825@N05/albums/72157680116996884
1973 XL250 K0 Motosport: UKX 73L
2023 R1250 GSA
Previous Zeds: Z750B1 Twin, Z650B1, Z750E
Re: BT45s Vs TT100s
Unless you have the same type of tyre the handbook refers to - I would be careful with that recommendation.
My Z1R currently has Bridgestones
36front and 41 rear is the starting point recommendation on that model
(although the best tyres for feel & general performance are Metzelers!)
My Z1R currently has Bridgestones
36front and 41 rear is the starting point recommendation on that model
(although the best tyres for feel & general performance are Metzelers!)
010
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- 100Club
- Posts: 303
- Joined: 3rd Aug 2013
- Location: Australia
Re: BT45s Vs TT100s
Andrew_s wrote:My Z900 is fitted with BT45s and seems to follow white lines and any imperfections in the road - tyre pressures are set at 28/32.
I understand TT100s are available and were the tyres to have back in the 70s/80s - but would TT100s improve matters as I had no issues back then that I recall, what's the general opinion of the 'modern' versions?
Cheers
Andrew
BT-45's all the way !!!!!!!!!!!!!!!!! I've been running them for 5 years now & push them quite hard & I wouldn't change em for the world ! I run F-30 - F-32 psi & have found that fine here as it's a bit warmer here .......so "Charles Law" dictates that the way to go for me.
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